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Finding the Fourth Proportional to 673.40, 1,008.17 and 488.46

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Solution

The fourth proportional to 673.40, 1,008.17 and 488.46 is: 731.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.40 : 1,008.17 = 488.46 : x
  2. Step 2: Convert to fraction form
    673.40/1,008.17 = 488.46/x
  3. Step 3: Cross multiply
    673.40x = 1,008.17 × 488.46
  4. Step 4: Simplify right side
    673.40x = 492,448.28
  5. Step 5: Solve for x
    x = 492,448.28/673.40
  6. Step 6: Final answer
    x = 731.29

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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.