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Finding the Fourth Proportional to 45.62, 62.88 and 38.70

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Solution

The fourth proportional to 45.62, 62.88 and 38.70 is: 53.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.62 : 62.88 = 38.70 : x
  2. Step 2: Convert to fraction form
    45.62/62.88 = 38.70/x
  3. Step 3: Cross multiply
    45.62x = 62.88 × 38.70
  4. Step 4: Simplify right side
    45.62x = 2,433.46
  5. Step 5: Solve for x
    x = 2,433.46/45.62
  6. Step 6: Final answer
    x = 53.35

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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.