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Finding the Fourth Proportional to 487,691.28, 672,982.56 and 272,794.32

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Solution

The fourth proportional to 487,691.28, 672,982.56 and 272,794.32 is: 376,438.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,691.28 : 672,982.56 = 272,794.32 : x
  2. Step 2: Convert to fraction form
    487,691.28/672,982.56 = 272,794.32/x
  3. Step 3: Cross multiply
    487,691.28x = 672,982.56 × 272,794.32
  4. Step 4: Simplify right side
    487,691.28x = 183,585,819,827.06
  5. Step 5: Solve for x
    x = 183,585,819,827.06/487,691.28
  6. Step 6: Final answer
    x = 376,438.59

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1.5x scale

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.