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Finding the Fourth Proportional to 672.56, 1,006.67 and 454.94

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Solution

The fourth proportional to 672.56, 1,006.67 and 454.94 is: 680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.56 : 1,006.67 = 454.94 : x
  2. Step 2: Convert to fraction form
    672.56/1,006.67 = 454.94/x
  3. Step 3: Cross multiply
    672.56x = 1,006.67 × 454.94
  4. Step 4: Simplify right side
    672.56x = 457,970.55
  5. Step 5: Solve for x
    x = 457,970.55/672.56
  6. Step 6: Final answer
    x = 680.94

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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.