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Finding the Fourth Proportional to 637.89, 879.72 and 462.93

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Solution

The fourth proportional to 637.89, 879.72 and 462.93 is: 638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.89 : 879.72 = 462.93 : x
  2. Step 2: Convert to fraction form
    637.89/879.72 = 462.93/x
  3. Step 3: Cross multiply
    637.89x = 879.72 × 462.93
  4. Step 4: Simplify right side
    637.89x = 407,248.78
  5. Step 5: Solve for x
    x = 407,248.78/637.89
  6. Step 6: Final answer
    x = 638.43

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Double scale
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1.5x scale

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.