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Finding the Fourth Proportional to 713,530.48, 984,660.72 and 391,243.12

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Solution

The fourth proportional to 713,530.48, 984,660.72 and 391,243.12 is: 539,909.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,530.48 : 984,660.72 = 391,243.12 : x
  2. Step 2: Convert to fraction form
    713,530.48/984,660.72 = 391,243.12/x
  3. Step 3: Cross multiply
    713,530.48x = 984,660.72 × 391,243.12
  4. Step 4: Simplify right side
    713,530.48x = 385,241,732,234.25
  5. Step 5: Solve for x
    x = 385,241,732,234.25/713,530.48
  6. Step 6: Final answer
    x = 539,909.29

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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.