Home / 390,438,733.54-538,815,368.25-214,226,681.86

Finding the Fourth Proportional to 390,438,733.54, 538,815,368.25 and 214,226,681.86

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Solution

The fourth proportional to 390,438,733.54, 538,815,368.25 and 214,226,681.86 is: 295,638,261.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,438,733.54 : 538,815,368.25 = 214,226,681.86 : x
  2. Step 2: Convert to fraction form
    390,438,733.54/538,815,368.25 = 214,226,681.86/x
  3. Step 3: Cross multiply
    390,438,733.54x = 538,815,368.25 × 214,226,681.86
  4. Step 4: Simplify right side
    390,438,733.54x = 115,428,628,475,371,504
  5. Step 5: Solve for x
    x = 115,428,628,475,371,504/390,438,733.54
  6. Step 6: Final answer
    x = 295,638,261.68

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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.