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Finding the Fourth Proportional to 943.12, 1,301.28 and 550

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Solution

The fourth proportional to 943.12, 1,301.28 and 550 is: 758.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.12 : 1,301.28 = 550 : x
  2. Step 2: Convert to fraction form
    943.12/1,301.28 = 550/x
  3. Step 3: Cross multiply
    943.12x = 1,301.28 × 550
  4. Step 4: Simplify right side
    943.12x = 715,704
  5. Step 5: Solve for x
    x = 715,704/943.12
  6. Step 6: Final answer
    x = 758.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.