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Finding the Fourth Proportional to 713,453.72, 984,539.82 and 391,156.70

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Solution

The fourth proportional to 713,453.72, 984,539.82 and 391,156.70 is: 539,781.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,453.72 : 984,539.82 = 391,156.70 : x
  2. Step 2: Convert to fraction form
    713,453.72/984,539.82 = 391,156.70/x
  3. Step 3: Cross multiply
    713,453.72x = 984,539.82 × 391,156.70
  4. Step 4: Simplify right side
    713,453.72x = 385,109,347,009.79
  5. Step 5: Solve for x
    x = 385,109,347,009.79/713,453.72
  6. Step 6: Final answer
    x = 539,781.82

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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.