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Finding the Fourth Proportional to 47.53, 65.38 and 47.18

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Solution

The fourth proportional to 47.53, 65.38 and 47.18 is: 64.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.53 : 65.38 = 47.18 : x
  2. Step 2: Convert to fraction form
    47.53/65.38 = 47.18/x
  3. Step 3: Cross multiply
    47.53x = 65.38 × 47.18
  4. Step 4: Simplify right side
    47.53x = 3,084.76
  5. Step 5: Solve for x
    x = 3,084.76/47.53
  6. Step 6: Final answer
    x = 64.91

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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.