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Finding the Fourth Proportional to 927.92, 1,281.12 and 579.12

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Solution

The fourth proportional to 927.92, 1,281.12 and 579.12 is: 799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.92 : 1,281.12 = 579.12 : x
  2. Step 2: Convert to fraction form
    927.92/1,281.12 = 579.12/x
  3. Step 3: Cross multiply
    927.92x = 1,281.12 × 579.12
  4. Step 4: Simplify right side
    927.92x = 741,922.21
  5. Step 5: Solve for x
    x = 741,922.21/927.92
  6. Step 6: Final answer
    x = 799.55

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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.