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Finding the Fourth Proportional to 57.42, 79.04 and 51.89

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Solution

The fourth proportional to 57.42, 79.04 and 51.89 is: 71.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.42 : 79.04 = 51.89 : x
  2. Step 2: Convert to fraction form
    57.42/79.04 = 51.89/x
  3. Step 3: Cross multiply
    57.42x = 79.04 × 51.89
  4. Step 4: Simplify right side
    57.42x = 4,101.12
  5. Step 5: Solve for x
    x = 4,101.12/57.42
  6. Step 6: Final answer
    x = 71.42

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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.