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Finding the Fourth Proportional to 479.52, 660.45 and 381.11

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Solution

The fourth proportional to 479.52, 660.45 and 381.11 is: 524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.52 : 660.45 = 381.11 : x
  2. Step 2: Convert to fraction form
    479.52/660.45 = 381.11/x
  3. Step 3: Cross multiply
    479.52x = 660.45 × 381.11
  4. Step 4: Simplify right side
    479.52x = 251,702.23
  5. Step 5: Solve for x
    x = 251,702.23/479.52
  6. Step 6: Final answer
    x = 524.90

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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.