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Finding the Fourth Proportional to 637.29, 879.43 and 353.69

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Solution

The fourth proportional to 637.29, 879.43 and 353.69 is: 488.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.29 : 879.43 = 353.69 : x
  2. Step 2: Convert to fraction form
    637.29/879.43 = 353.69/x
  3. Step 3: Cross multiply
    637.29x = 879.43 × 353.69
  4. Step 4: Simplify right side
    637.29x = 311,045.60
  5. Step 5: Solve for x
    x = 311,045.60/637.29
  6. Step 6: Final answer
    x = 488.08

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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.