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Finding the Fourth Proportional to 966.32, 1,448.40 and 418.40

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Solution

The fourth proportional to 966.32, 1,448.40 and 418.40 is: 627.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.32 : 1,448.40 = 418.40 : x
  2. Step 2: Convert to fraction form
    966.32/1,448.40 = 418.40/x
  3. Step 3: Cross multiply
    966.32x = 1,448.40 × 418.40
  4. Step 4: Simplify right side
    966.32x = 606,010.56
  5. Step 5: Solve for x
    x = 606,010.56/966.32
  6. Step 6: Final answer
    x = 627.13

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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.