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Finding the Fourth Proportional to 487.53, 672.73 and 291

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Solution

The fourth proportional to 487.53, 672.73 and 291 is: 401.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.53 : 672.73 = 291 : x
  2. Step 2: Convert to fraction form
    487.53/672.73 = 291/x
  3. Step 3: Cross multiply
    487.53x = 672.73 × 291
  4. Step 4: Simplify right side
    487.53x = 195,763.70
  5. Step 5: Solve for x
    x = 195,763.70/487.53
  6. Step 6: Final answer
    x = 401.54

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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.