Home / 657,317.31-986,384.21-420,829.71

Finding the Fourth Proportional to 657,317.31, 986,384.21 and 420,829.71

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Solution

The fourth proportional to 657,317.31, 986,384.21 and 420,829.71 is: 631,505.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,317.31 : 986,384.21 = 420,829.71 : x
  2. Step 2: Convert to fraction form
    657,317.31/986,384.21 = 420,829.71/x
  3. Step 3: Cross multiply
    657,317.31x = 986,384.21 × 420,829.71
  4. Step 4: Simplify right side
    657,317.31x = 415,099,778,938.73
  5. Step 5: Solve for x
    x = 415,099,778,938.73/657,317.31
  6. Step 6: Final answer
    x = 631,505.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.