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Finding the Fourth Proportional to 964.41, 1,446.63 and 387.28

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Solution

The fourth proportional to 964.41, 1,446.63 and 387.28 is: 580.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.41 : 1,446.63 = 387.28 : x
  2. Step 2: Convert to fraction form
    964.41/1,446.63 = 387.28/x
  3. Step 3: Cross multiply
    964.41x = 1,446.63 × 387.28
  4. Step 4: Simplify right side
    964.41x = 560,251.22
  5. Step 5: Solve for x
    x = 560,251.22/964.41
  6. Step 6: Final answer
    x = 580.93

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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.