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Finding the Fourth Proportional to 966.28, 1,448.61 and 389.56

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Solution

The fourth proportional to 966.28, 1,448.61 and 389.56 is: 584.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.28 : 1,448.61 = 389.56 : x
  2. Step 2: Convert to fraction form
    966.28/1,448.61 = 389.56/x
  3. Step 3: Cross multiply
    966.28x = 1,448.61 × 389.56
  4. Step 4: Simplify right side
    966.28x = 564,320.51
  5. Step 5: Solve for x
    x = 564,320.51/966.28
  6. Step 6: Final answer
    x = 584.01

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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.