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Finding the Fourth Proportional to 52.79, 72.50 and 47.93

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Solution

The fourth proportional to 52.79, 72.50 and 47.93 is: 65.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.79 : 72.50 = 47.93 : x
  2. Step 2: Convert to fraction form
    52.79/72.50 = 47.93/x
  3. Step 3: Cross multiply
    52.79x = 72.50 × 47.93
  4. Step 4: Simplify right side
    52.79x = 3,474.32
  5. Step 5: Solve for x
    x = 3,474.32/52.79
  6. Step 6: Final answer
    x = 65.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.