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Finding the Fourth Proportional to 638.20, 881.24 and 417.16

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Solution

The fourth proportional to 638.20, 881.24 and 417.16 is: 576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.20 : 881.24 = 417.16 : x
  2. Step 2: Convert to fraction form
    638.20/881.24 = 417.16/x
  3. Step 3: Cross multiply
    638.20x = 881.24 × 417.16
  4. Step 4: Simplify right side
    638.20x = 367,618.08
  5. Step 5: Solve for x
    x = 367,618.08/638.20
  6. Step 6: Final answer
    x = 576.02

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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.