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Finding the Fourth Proportional to 672.16, 1,001.48 and 628

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Solution

The fourth proportional to 672.16, 1,001.48 and 628 is: 935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.16 : 1,001.48 = 628 : x
  2. Step 2: Convert to fraction form
    672.16/1,001.48 = 628/x
  3. Step 3: Cross multiply
    672.16x = 1,001.48 × 628
  4. Step 4: Simplify right side
    672.16x = 628,929.44
  5. Step 5: Solve for x
    x = 628,929.44/672.16
  6. Step 6: Final answer
    x = 935.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.