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Finding the Fourth Proportional to 487,439.82, 672,654.36 and 269,642.82

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Solution

The fourth proportional to 487,439.82, 672,654.36 and 269,642.82 is: 372,100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,439.82 : 672,654.36 = 269,642.82 : x
  2. Step 2: Convert to fraction form
    487,439.82/672,654.36 = 269,642.82/x
  3. Step 3: Cross multiply
    487,439.82x = 672,654.36 × 269,642.82
  4. Step 4: Simplify right side
    487,439.82x = 181,376,418,515.70
  5. Step 5: Solve for x
    x = 181,376,418,515.70/487,439.82
  6. Step 6: Final answer
    x = 372,100.13

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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.