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Finding the Fourth Proportional to 713,757.78, 984,990.63 and 391,470.18

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Solution

The fourth proportional to 713,757.78, 984,990.63 and 391,470.18 is: 540,231.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,757.78 : 984,990.63 = 391,470.18 : x
  2. Step 2: Convert to fraction form
    713,757.78/984,990.63 = 391,470.18/x
  3. Step 3: Cross multiply
    713,757.78x = 984,990.63 × 391,470.18
  4. Step 4: Simplify right side
    713,757.78x = 385,594,459,224.41
  5. Step 5: Solve for x
    x = 385,594,459,224.41/713,757.78
  6. Step 6: Final answer
    x = 540,231.53

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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.