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Finding the Fourth Proportional to 615,399.92, 849,294.57 and 343,520.78

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Solution

The fourth proportional to 615,399.92, 849,294.57 and 343,520.78 is: 474,082.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,399.92 : 849,294.57 = 343,520.78 : x
  2. Step 2: Convert to fraction form
    615,399.92/849,294.57 = 343,520.78/x
  3. Step 3: Cross multiply
    615,399.92x = 849,294.57 × 343,520.78
  4. Step 4: Simplify right side
    615,399.92x = 291,750,333,136.17
  5. Step 5: Solve for x
    x = 291,750,333,136.17/615,399.92
  6. Step 6: Final answer
    x = 474,082.50

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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.