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Finding the Fourth Proportional to 752.95, 1,129.38 and 205.17

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Solution

The fourth proportional to 752.95, 1,129.38 and 205.17 is: 307.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.95 : 1,129.38 = 205.17 : x
  2. Step 2: Convert to fraction form
    752.95/1,129.38 = 205.17/x
  3. Step 3: Cross multiply
    752.95x = 1,129.38 × 205.17
  4. Step 4: Simplify right side
    752.95x = 231,714.89
  5. Step 5: Solve for x
    x = 231,714.89/752.95
  6. Step 6: Final answer
    x = 307.74

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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.