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Finding the Fourth Proportional to 672.38, 927.76 and 618.62

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Solution

The fourth proportional to 672.38, 927.76 and 618.62 is: 853.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.38 : 927.76 = 618.62 : x
  2. Step 2: Convert to fraction form
    672.38/927.76 = 618.62/x
  3. Step 3: Cross multiply
    672.38x = 927.76 × 618.62
  4. Step 4: Simplify right side
    672.38x = 573,930.89
  5. Step 5: Solve for x
    x = 573,930.89/672.38
  6. Step 6: Final answer
    x = 853.58

Related Problems

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Half scale
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Double scale
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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.