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Finding the Fourth Proportional to 637.96, 879.96 and 402.04

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Solution

The fourth proportional to 637.96, 879.96 and 402.04 is: 554.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.96 : 879.96 = 402.04 : x
  2. Step 2: Convert to fraction form
    637.96/879.96 = 402.04/x
  3. Step 3: Cross multiply
    637.96x = 879.96 × 402.04
  4. Step 4: Simplify right side
    637.96x = 353,779.12
  5. Step 5: Solve for x
    x = 353,779.12/637.96
  6. Step 6: Final answer
    x = 554.55

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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.