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Finding the Fourth Proportional to 487.45, 672.67 and 271.86

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Solution

The fourth proportional to 487.45, 672.67 and 271.86 is: 375.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.45 : 672.67 = 271.86 : x
  2. Step 2: Convert to fraction form
    487.45/672.67 = 271.86/x
  3. Step 3: Cross multiply
    487.45x = 672.67 × 271.86
  4. Step 4: Simplify right side
    487.45x = 182,872.07
  5. Step 5: Solve for x
    x = 182,872.07/487.45
  6. Step 6: Final answer
    x = 375.16

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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.