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Finding the Fourth Proportional to 713,663.34, 984,856.77 and 391,375.68

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Solution

The fourth proportional to 713,663.34, 984,856.77 and 391,375.68 is: 540,099.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,663.34 : 984,856.77 = 391,375.68 : x
  2. Step 2: Convert to fraction form
    713,663.34/984,856.77 = 391,375.68/x
  3. Step 3: Cross multiply
    713,663.34x = 984,856.77 × 391,375.68
  4. Step 4: Simplify right side
    713,663.34x = 385,448,988,061.35
  5. Step 5: Solve for x
    x = 385,448,988,061.35/713,663.34
  6. Step 6: Final answer
    x = 540,099.18

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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.