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Finding the Fourth Proportional to 680,167.58, 938,639.16 and 389,773.40

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Solution

The fourth proportional to 680,167.58, 938,639.16 and 389,773.40 is: 537,891.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,167.58 : 938,639.16 = 389,773.40 : x
  2. Step 2: Convert to fraction form
    680,167.58/938,639.16 = 389,773.40/x
  3. Step 3: Cross multiply
    680,167.58x = 938,639.16 × 389,773.40
  4. Step 4: Simplify right side
    680,167.58x = 365,856,572,073.15
  5. Step 5: Solve for x
    x = 365,856,572,073.15/680,167.58
  6. Step 6: Final answer
    x = 537,891.82

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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.