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Finding the Fourth Proportional to 390,610.73, 585,767.45 and 137,844.10

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Solution

The fourth proportional to 390,610.73, 585,767.45 and 137,844.10 is: 206,713.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,610.73 : 585,767.45 = 137,844.10 : x
  2. Step 2: Convert to fraction form
    390,610.73/585,767.45 = 137,844.10/x
  3. Step 3: Cross multiply
    390,610.73x = 585,767.45 × 137,844.10
  4. Step 4: Simplify right side
    390,610.73x = 80,744,588,903.46
  5. Step 5: Solve for x
    x = 80,744,588,903.46/390,610.73
  6. Step 6: Final answer
    x = 206,713.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.