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Finding the Fourth Proportional to 307.70, 424.64 and 176.72

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Solution

The fourth proportional to 307.70, 424.64 and 176.72 is: 243.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.70 : 424.64 = 176.72 : x
  2. Step 2: Convert to fraction form
    307.70/424.64 = 176.72/x
  3. Step 3: Cross multiply
    307.70x = 424.64 × 176.72
  4. Step 4: Simplify right side
    307.70x = 75,042.38
  5. Step 5: Solve for x
    x = 75,042.38/307.70
  6. Step 6: Final answer
    x = 243.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.