Home / 914,791,984.69-1,262,317,907.59-538,426,126.86

Finding the Fourth Proportional to 914,791,984.69, 1,262,317,907.59 and 538,426,126.86

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Solution

The fourth proportional to 914,791,984.69, 1,262,317,907.59 and 538,426,126.86 is: 742,972,121.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    914,791,984.69 : 1,262,317,907.59 = 538,426,126.86 : x
  2. Step 2: Convert to fraction form
    914,791,984.69/1,262,317,907.59 = 538,426,126.86/x
  3. Step 3: Cross multiply
    914,791,984.69x = 1,262,317,907.59 × 538,426,126.86
  4. Step 4: Simplify right side
    914,791,984.69x = 679,664,941,849,703,040
  5. Step 5: Solve for x
    x = 679,664,941,849,703,040/914,791,984.69
  6. Step 6: Final answer
    x = 742,972,121.78

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Double scale
Find fourth proportional to 914,791,985.69, 1,262,317,908.97 and 538,426,127.86
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.