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Finding the Fourth Proportional to 45.20, 61.89 and 45.04

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Solution

The fourth proportional to 45.20, 61.89 and 45.04 is: 61.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.20 : 61.89 = 45.04 : x
  2. Step 2: Convert to fraction form
    45.20/61.89 = 45.04/x
  3. Step 3: Cross multiply
    45.20x = 61.89 × 45.04
  4. Step 4: Simplify right side
    45.20x = 2,787.53
  5. Step 5: Solve for x
    x = 2,787.53/45.20
  6. Step 6: Final answer
    x = 61.67

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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.