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Finding the Fourth Proportional to 713,640.84, 984,837.89 and 391,331.72

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Solution

The fourth proportional to 713,640.84, 984,837.89 and 391,331.72 is: 540,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,640.84 : 984,837.89 = 391,331.72 : x
  2. Step 2: Convert to fraction form
    713,640.84/984,837.89 = 391,331.72/x
  3. Step 3: Cross multiply
    713,640.84x = 984,837.89 × 391,331.72
  4. Step 4: Simplify right side
    713,640.84x = 385,398,301,469.01
  5. Step 5: Solve for x
    x = 385,398,301,469.01/713,640.84
  6. Step 6: Final answer
    x = 540,045.19

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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.