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Finding the Fourth Proportional to 43.50, 64.76 and 42.36

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Solution

The fourth proportional to 43.50, 64.76 and 42.36 is: 63.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.50 : 64.76 = 42.36 : x
  2. Step 2: Convert to fraction form
    43.50/64.76 = 42.36/x
  3. Step 3: Cross multiply
    43.50x = 64.76 × 42.36
  4. Step 4: Simplify right side
    43.50x = 2,743.02
  5. Step 5: Solve for x
    x = 2,743.02/43.50
  6. Step 6: Final answer
    x = 63.06

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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.