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Finding the Fourth Proportional to 966.36, 1,449.81 and 317.55

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Solution

The fourth proportional to 966.36, 1,449.81 and 317.55 is: 476.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.36 : 1,449.81 = 317.55 : x
  2. Step 2: Convert to fraction form
    966.36/1,449.81 = 317.55/x
  3. Step 3: Cross multiply
    966.36x = 1,449.81 × 317.55
  4. Step 4: Simplify right side
    966.36x = 460,378.33
  5. Step 5: Solve for x
    x = 460,378.33/966.36
  6. Step 6: Final answer
    x = 476.41

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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.