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Finding the Fourth Proportional to 672.40, 1,007.42 and 467.10

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Solution

The fourth proportional to 672.40, 1,007.42 and 467.10 is: 699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.40 : 1,007.42 = 467.10 : x
  2. Step 2: Convert to fraction form
    672.40/1,007.42 = 467.10/x
  3. Step 3: Cross multiply
    672.40x = 1,007.42 × 467.10
  4. Step 4: Simplify right side
    672.40x = 470,566.17
  5. Step 5: Solve for x
    x = 470,566.17/672.40
  6. Step 6: Final answer
    x = 699.83

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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.