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Finding the Fourth Proportional to 964.57, 1,446.91 and 387.44

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Solution

The fourth proportional to 964.57, 1,446.91 and 387.44 is: 581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.57 : 1,446.91 = 387.44 : x
  2. Step 2: Convert to fraction form
    964.57/1,446.91 = 387.44/x
  3. Step 3: Cross multiply
    964.57x = 1,446.91 × 387.44
  4. Step 4: Simplify right side
    964.57x = 560,590.81
  5. Step 5: Solve for x
    x = 560,590.81/964.57
  6. Step 6: Final answer
    x = 581.19

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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.