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Finding the Fourth Proportional to 674.26, 930.76 and 488.66

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Solution

The fourth proportional to 674.26, 930.76 and 488.66 is: 674.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.26 : 930.76 = 488.66 : x
  2. Step 2: Convert to fraction form
    674.26/930.76 = 488.66/x
  3. Step 3: Cross multiply
    674.26x = 930.76 × 488.66
  4. Step 4: Simplify right side
    674.26x = 454,819.31
  5. Step 5: Solve for x
    x = 454,819.31/674.26
  6. Step 6: Final answer
    x = 674.55

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1.5x scale

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.