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Finding the Fourth Proportional to 52.93, 72.97 and 42

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Solution

The fourth proportional to 52.93, 72.97 and 42 is: 57.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.93 : 72.97 = 42 : x
  2. Step 2: Convert to fraction form
    52.93/72.97 = 42/x
  3. Step 3: Cross multiply
    52.93x = 72.97 × 42
  4. Step 4: Simplify right side
    52.93x = 3,064.74
  5. Step 5: Solve for x
    x = 3,064.74/52.93
  6. Step 6: Final answer
    x = 57.90

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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.