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Finding the Fourth Proportional to 674.29, 1,011.44 and 308.89

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Solution

The fourth proportional to 674.29, 1,011.44 and 308.89 is: 463.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.29 : 1,011.44 = 308.89 : x
  2. Step 2: Convert to fraction form
    674.29/1,011.44 = 308.89/x
  3. Step 3: Cross multiply
    674.29x = 1,011.44 × 308.89
  4. Step 4: Simplify right side
    674.29x = 312,423.70
  5. Step 5: Solve for x
    x = 312,423.70/674.29
  6. Step 6: Final answer
    x = 463.34

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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.