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Finding the Fourth Proportional to 47.32, 65.30 and 27.90

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Solution

The fourth proportional to 47.32, 65.30 and 27.90 is: 38.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.32 : 65.30 = 27.90 : x
  2. Step 2: Convert to fraction form
    47.32/65.30 = 27.90/x
  3. Step 3: Cross multiply
    47.32x = 65.30 × 27.90
  4. Step 4: Simplify right side
    47.32x = 1,821.87
  5. Step 5: Solve for x
    x = 1,821.87/47.32
  6. Step 6: Final answer
    x = 38.50

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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.