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Finding the Fourth Proportional to 43.53, 64.80 and 43.32

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Solution

The fourth proportional to 43.53, 64.80 and 43.32 is: 64.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.53 : 64.80 = 43.32 : x
  2. Step 2: Convert to fraction form
    43.53/64.80 = 43.32/x
  3. Step 3: Cross multiply
    43.53x = 64.80 × 43.32
  4. Step 4: Simplify right side
    43.53x = 2,807.14
  5. Step 5: Solve for x
    x = 2,807.14/43.53
  6. Step 6: Final answer
    x = 64.49

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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.