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Finding the Fourth Proportional to 389.52, 587.38 and 382.24

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Solution

The fourth proportional to 389.52, 587.38 and 382.24 is: 576.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.52 : 587.38 = 382.24 : x
  2. Step 2: Convert to fraction form
    389.52/587.38 = 382.24/x
  3. Step 3: Cross multiply
    389.52x = 587.38 × 382.24
  4. Step 4: Simplify right side
    389.52x = 224,520.13
  5. Step 5: Solve for x
    x = 224,520.13/389.52
  6. Step 6: Final answer
    x = 576.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.