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Finding the Fourth Proportional to 752.42, 1,126.80 and 621.62

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Solution

The fourth proportional to 752.42, 1,126.80 and 621.62 is: 930.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.42 : 1,126.80 = 621.62 : x
  2. Step 2: Convert to fraction form
    752.42/1,126.80 = 621.62/x
  3. Step 3: Cross multiply
    752.42x = 1,126.80 × 621.62
  4. Step 4: Simplify right side
    752.42x = 700,441.42
  5. Step 5: Solve for x
    x = 700,441.42/752.42
  6. Step 6: Final answer
    x = 930.92

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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.