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Finding the Fourth Proportional to 40.77, 56.20 and 36.15

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Solution

The fourth proportional to 40.77, 56.20 and 36.15 is: 49.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.77 : 56.20 = 36.15 : x
  2. Step 2: Convert to fraction form
    40.77/56.20 = 36.15/x
  3. Step 3: Cross multiply
    40.77x = 56.20 × 36.15
  4. Step 4: Simplify right side
    40.77x = 2,031.63
  5. Step 5: Solve for x
    x = 2,031.63/40.77
  6. Step 6: Final answer
    x = 49.83

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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.