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Finding the Fourth Proportional to 928.71, 1,393.07 and 441.66

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Solution

The fourth proportional to 928.71, 1,393.07 and 441.66 is: 662.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.71 : 1,393.07 = 441.66 : x
  2. Step 2: Convert to fraction form
    928.71/1,393.07 = 441.66/x
  3. Step 3: Cross multiply
    928.71x = 1,393.07 × 441.66
  4. Step 4: Simplify right side
    928.71x = 615,260.92
  5. Step 5: Solve for x
    x = 615,260.92/928.71
  6. Step 6: Final answer
    x = 662.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.