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Finding the Fourth Proportional to 637.30, 953.72 and 417.79

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Solution

The fourth proportional to 637.30, 953.72 and 417.79 is: 625.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.30 : 953.72 = 417.79 : x
  2. Step 2: Convert to fraction form
    637.30/953.72 = 417.79/x
  3. Step 3: Cross multiply
    637.30x = 953.72 × 417.79
  4. Step 4: Simplify right side
    637.30x = 398,454.68
  5. Step 5: Solve for x
    x = 398,454.68/637.30
  6. Step 6: Final answer
    x = 625.22

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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.