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Finding the Fourth Proportional to 257,066.91, 354,642.39 and 155,034.36

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Solution

The fourth proportional to 257,066.91, 354,642.39 and 155,034.36 is: 213,881.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,066.91 : 354,642.39 = 155,034.36 : x
  2. Step 2: Convert to fraction form
    257,066.91/354,642.39 = 155,034.36/x
  3. Step 3: Cross multiply
    257,066.91x = 354,642.39 × 155,034.36
  4. Step 4: Simplify right side
    257,066.91x = 54,981,755,962.52
  5. Step 5: Solve for x
    x = 54,981,755,962.52/257,066.91
  6. Step 6: Final answer
    x = 213,881.11

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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.