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Finding the Fourth Proportional to 661,616.12, 913,002.42 and 375,155.48

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Solution

The fourth proportional to 661,616.12, 913,002.42 and 375,155.48 is: 517,698.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,616.12 : 913,002.42 = 375,155.48 : x
  2. Step 2: Convert to fraction form
    661,616.12/913,002.42 = 375,155.48/x
  3. Step 3: Cross multiply
    661,616.12x = 913,002.42 × 375,155.48
  4. Step 4: Simplify right side
    661,616.12x = 342,517,861,116.26
  5. Step 5: Solve for x
    x = 342,517,861,116.26/661,616.12
  6. Step 6: Final answer
    x = 517,698.78

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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.