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Finding the Fourth Proportional to 674.63, 1,006.10 and 628.46

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Solution

The fourth proportional to 674.63, 1,006.10 and 628.46 is: 937.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.63 : 1,006.10 = 628.46 : x
  2. Step 2: Convert to fraction form
    674.63/1,006.10 = 628.46/x
  3. Step 3: Cross multiply
    674.63x = 1,006.10 × 628.46
  4. Step 4: Simplify right side
    674.63x = 632,290.15
  5. Step 5: Solve for x
    x = 632,290.15/674.63
  6. Step 6: Final answer
    x = 937.25

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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.