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Finding the Fourth Proportional to 963.64, 1,446 and 386.56

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Solution

The fourth proportional to 963.64, 1,446 and 386.56 is: 580.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.64 : 1,446 = 386.56 : x
  2. Step 2: Convert to fraction form
    963.64/1,446 = 386.56/x
  3. Step 3: Cross multiply
    963.64x = 1,446 × 386.56
  4. Step 4: Simplify right side
    963.64x = 558,965.76
  5. Step 5: Solve for x
    x = 558,965.76/963.64
  6. Step 6: Final answer
    x = 580.06

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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.