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Finding the Fourth Proportional to 43.47, 64.73 and 42.96

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Solution

The fourth proportional to 43.47, 64.73 and 42.96 is: 63.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.47 : 64.73 = 42.96 : x
  2. Step 2: Convert to fraction form
    43.47/64.73 = 42.96/x
  3. Step 3: Cross multiply
    43.47x = 64.73 × 42.96
  4. Step 4: Simplify right side
    43.47x = 2,780.26
  5. Step 5: Solve for x
    x = 2,780.26/43.47
  6. Step 6: Final answer
    x = 63.96

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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.