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Finding the Fourth Proportional to 387.45, 581.22 and 224.91

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Solution

The fourth proportional to 387.45, 581.22 and 224.91 is: 337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.45 : 581.22 = 224.91 : x
  2. Step 2: Convert to fraction form
    387.45/581.22 = 224.91/x
  3. Step 3: Cross multiply
    387.45x = 581.22 × 224.91
  4. Step 4: Simplify right side
    387.45x = 130,722.19
  5. Step 5: Solve for x
    x = 130,722.19/387.45
  6. Step 6: Final answer
    x = 337.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.