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Finding the Fourth Proportional to 671.46, 1,005.27 and 454.65

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Solution

The fourth proportional to 671.46, 1,005.27 and 454.65 is: 680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.46 : 1,005.27 = 454.65 : x
  2. Step 2: Convert to fraction form
    671.46/1,005.27 = 454.65/x
  3. Step 3: Cross multiply
    671.46x = 1,005.27 × 454.65
  4. Step 4: Simplify right side
    671.46x = 457,046.01
  5. Step 5: Solve for x
    x = 457,046.01/671.46
  6. Step 6: Final answer
    x = 680.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.