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Finding the Fourth Proportional to 45.56, 62.81 and 40.07

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Solution

The fourth proportional to 45.56, 62.81 and 40.07 is: 55.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.56 : 62.81 = 40.07 : x
  2. Step 2: Convert to fraction form
    45.56/62.81 = 40.07/x
  3. Step 3: Cross multiply
    45.56x = 62.81 × 40.07
  4. Step 4: Simplify right side
    45.56x = 2,516.90
  5. Step 5: Solve for x
    x = 2,516.90/45.56
  6. Step 6: Final answer
    x = 55.24

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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.