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Finding the Fourth Proportional to 47.98, 65.90 and 43.89

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Solution

The fourth proportional to 47.98, 65.90 and 43.89 is: 60.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.98 : 65.90 = 43.89 : x
  2. Step 2: Convert to fraction form
    47.98/65.90 = 43.89/x
  3. Step 3: Cross multiply
    47.98x = 65.90 × 43.89
  4. Step 4: Simplify right side
    47.98x = 2,892.35
  5. Step 5: Solve for x
    x = 2,892.35/47.98
  6. Step 6: Final answer
    x = 60.28

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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.