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Finding the Fourth Proportional to 713,421.54, 984,495.60 and 391,124.57

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Solution

The fourth proportional to 713,421.54, 984,495.60 and 391,124.57 is: 539,737.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,421.54 : 984,495.60 = 391,124.57 : x
  2. Step 2: Convert to fraction form
    713,421.54/984,495.60 = 391,124.57/x
  3. Step 3: Cross multiply
    713,421.54x = 984,495.60 × 391,124.57
  4. Step 4: Simplify right side
    713,421.54x = 385,060,413,294.41
  5. Step 5: Solve for x
    x = 385,060,413,294.41/713,421.54
  6. Step 6: Final answer
    x = 539,737.58

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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.