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Finding the Fourth Proportional to 921.16, 1,269.84 and 672.76

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Solution

The fourth proportional to 921.16, 1,269.84 and 672.76 is: 927.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.16 : 1,269.84 = 672.76 : x
  2. Step 2: Convert to fraction form
    921.16/1,269.84 = 672.76/x
  3. Step 3: Cross multiply
    921.16x = 1,269.84 × 672.76
  4. Step 4: Simplify right side
    921.16x = 854,297.56
  5. Step 5: Solve for x
    x = 854,297.56/921.16
  6. Step 6: Final answer
    x = 927.41

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.