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Finding the Fourth Proportional to 753.57, 1,130.69 and 681.11

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Solution

The fourth proportional to 753.57, 1,130.69 and 681.11 is: 1,021.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.57 : 1,130.69 = 681.11 : x
  2. Step 2: Convert to fraction form
    753.57/1,130.69 = 681.11/x
  3. Step 3: Cross multiply
    753.57x = 1,130.69 × 681.11
  4. Step 4: Simplify right side
    753.57x = 770,124.56
  5. Step 5: Solve for x
    x = 770,124.56/753.57
  6. Step 6: Final answer
    x = 1,021.97

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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.