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Finding the Fourth Proportional to 966.25, 1,447.46 and 477.81

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Solution

The fourth proportional to 966.25, 1,447.46 and 477.81 is: 715.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.25 : 1,447.46 = 477.81 : x
  2. Step 2: Convert to fraction form
    966.25/1,447.46 = 477.81/x
  3. Step 3: Cross multiply
    966.25x = 1,447.46 × 477.81
  4. Step 4: Simplify right side
    966.25x = 691,608.47
  5. Step 5: Solve for x
    x = 691,608.47/966.25
  6. Step 6: Final answer
    x = 715.77

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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.