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Finding the Fourth Proportional to 60, 82.64 and 40.32

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Solution

The fourth proportional to 60, 82.64 and 40.32 is: 55.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60 : 82.64 = 40.32 : x
  2. Step 2: Convert to fraction form
    60/82.64 = 40.32/x
  3. Step 3: Cross multiply
    60x = 82.64 × 40.32
  4. Step 4: Simplify right side
    60x = 3,332.04
  5. Step 5: Solve for x
    x = 3,332.04/60
  6. Step 6: Final answer
    x = 55.53

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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.