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Finding the Fourth Proportional to 53.87, 80.70 and 40.32

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Solution

The fourth proportional to 53.87, 80.70 and 40.32 is: 60.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.87 : 80.70 = 40.32 : x
  2. Step 2: Convert to fraction form
    53.87/80.70 = 40.32/x
  3. Step 3: Cross multiply
    53.87x = 80.70 × 40.32
  4. Step 4: Simplify right side
    53.87x = 3,253.82
  5. Step 5: Solve for x
    x = 3,253.82/53.87
  6. Step 6: Final answer
    x = 60.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.