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Finding the Fourth Proportional to 40.99, 56.08 and 40.87

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Solution

The fourth proportional to 40.99, 56.08 and 40.87 is: 55.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.99 : 56.08 = 40.87 : x
  2. Step 2: Convert to fraction form
    40.99/56.08 = 40.87/x
  3. Step 3: Cross multiply
    40.99x = 56.08 × 40.87
  4. Step 4: Simplify right side
    40.99x = 2,291.82
  5. Step 5: Solve for x
    x = 2,291.82/40.99
  6. Step 6: Final answer
    x = 55.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.