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Finding the Fourth Proportional to 637.05, 879.20 and 357.29

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Solution

The fourth proportional to 637.05, 879.20 and 357.29 is: 493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.05 : 879.20 = 357.29 : x
  2. Step 2: Convert to fraction form
    637.05/879.20 = 357.29/x
  3. Step 3: Cross multiply
    637.05x = 879.20 × 357.29
  4. Step 4: Simplify right side
    637.05x = 314,134.78
  5. Step 5: Solve for x
    x = 314,134.78/637.05
  6. Step 6: Final answer
    x = 493.11

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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.