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Finding the Fourth Proportional to 45.87, 63.36 and 40.74

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Solution

The fourth proportional to 45.87, 63.36 and 40.74 is: 56.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.87 : 63.36 = 40.74 : x
  2. Step 2: Convert to fraction form
    45.87/63.36 = 40.74/x
  3. Step 3: Cross multiply
    45.87x = 63.36 × 40.74
  4. Step 4: Simplify right side
    45.87x = 2,581.29
  5. Step 5: Solve for x
    x = 2,581.29/45.87
  6. Step 6: Final answer
    x = 56.27

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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.