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Finding the Fourth Proportional to 52.23, 77.90 and 49.95

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Solution

The fourth proportional to 52.23, 77.90 and 49.95 is: 74.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.23 : 77.90 = 49.95 : x
  2. Step 2: Convert to fraction form
    52.23/77.90 = 49.95/x
  3. Step 3: Cross multiply
    52.23x = 77.90 × 49.95
  4. Step 4: Simplify right side
    52.23x = 3,890.86
  5. Step 5: Solve for x
    x = 3,890.86/52.23
  6. Step 6: Final answer
    x = 74.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.