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Finding the Fourth Proportional to 672.03, 1,010.07 and 657.65

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Solution

The fourth proportional to 672.03, 1,010.07 and 657.65 is: 988.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.03 : 1,010.07 = 657.65 : x
  2. Step 2: Convert to fraction form
    672.03/1,010.07 = 657.65/x
  3. Step 3: Cross multiply
    672.03x = 1,010.07 × 657.65
  4. Step 4: Simplify right side
    672.03x = 664,275.06
  5. Step 5: Solve for x
    x = 664,275.06/672.03
  6. Step 6: Final answer
    x = 988.46

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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.