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Finding the Fourth Proportional to 963.72, 1,446.36 and 386.76

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Solution

The fourth proportional to 963.72, 1,446.36 and 386.76 is: 580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.72 : 1,446.36 = 386.76 : x
  2. Step 2: Convert to fraction form
    963.72/1,446.36 = 386.76/x
  3. Step 3: Cross multiply
    963.72x = 1,446.36 × 386.76
  4. Step 4: Simplify right side
    963.72x = 559,394.19
  5. Step 5: Solve for x
    x = 559,394.19/963.72
  6. Step 6: Final answer
    x = 580.45

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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.