Home / 1,387,955.45-1,915,367.69-776,109.39

Finding the Fourth Proportional to 1,387,955.45, 1,915,367.69 and 776,109.39

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Solution

The fourth proportional to 1,387,955.45, 1,915,367.69 and 776,109.39 is: 1,071,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,955.45 : 1,915,367.69 = 776,109.39 : x
  2. Step 2: Convert to fraction form
    1,387,955.45/1,915,367.69 = 776,109.39/x
  3. Step 3: Cross multiply
    1,387,955.45x = 1,915,367.69 × 776,109.39
  4. Step 4: Simplify right side
    1,387,955.45x = 1,486,534,845,631.06
  5. Step 5: Solve for x
    x = 1,486,534,845,631.06/1,387,955.45
  6. Step 6: Final answer
    x = 1,071,024.90

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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.