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Finding the Fourth Proportional to 390,132.95, 585,082.79 and 203,042.39

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Solution

The fourth proportional to 390,132.95, 585,082.79 and 203,042.39 is: 304,502.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,132.95 : 585,082.79 = 203,042.39 : x
  2. Step 2: Convert to fraction form
    390,132.95/585,082.79 = 203,042.39/x
  3. Step 3: Cross multiply
    390,132.95x = 585,082.79 × 203,042.39
  4. Step 4: Simplify right side
    390,132.95x = 118,796,607,014.26
  5. Step 5: Solve for x
    x = 118,796,607,014.26/390,132.95
  6. Step 6: Final answer
    x = 304,502.88

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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.