Home / 1,142.20-1,576.22-618.22

Finding the Fourth Proportional to 1,142.20, 1,576.22 and 618.22

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Solution

The fourth proportional to 1,142.20, 1,576.22 and 618.22 is: 853.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.20 : 1,576.22 = 618.22 : x
  2. Step 2: Convert to fraction form
    1,142.20/1,576.22 = 618.22/x
  3. Step 3: Cross multiply
    1,142.20x = 1,576.22 × 618.22
  4. Step 4: Simplify right side
    1,142.20x = 974,439.76
  5. Step 5: Solve for x
    x = 974,439.76/1,142.20
  6. Step 6: Final answer
    x = 853.13

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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.