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Finding the Fourth Proportional to 752.12, 1,127.11 and 340.55

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Solution

The fourth proportional to 752.12, 1,127.11 and 340.55 is: 510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.12 : 1,127.11 = 340.55 : x
  2. Step 2: Convert to fraction form
    752.12/1,127.11 = 340.55/x
  3. Step 3: Cross multiply
    752.12x = 1,127.11 × 340.55
  4. Step 4: Simplify right side
    752.12x = 383,837.31
  5. Step 5: Solve for x
    x = 383,837.31/752.12
  6. Step 6: Final answer
    x = 510.34

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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.