Home / 1,031.20-1,423.06-611.76

Finding the Fourth Proportional to 1,031.20, 1,423.06 and 611.76

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Solution

The fourth proportional to 1,031.20, 1,423.06 and 611.76 is: 844.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.20 : 1,423.06 = 611.76 : x
  2. Step 2: Convert to fraction form
    1,031.20/1,423.06 = 611.76/x
  3. Step 3: Cross multiply
    1,031.20x = 1,423.06 × 611.76
  4. Step 4: Simplify right side
    1,031.20x = 870,564.57
  5. Step 5: Solve for x
    x = 870,564.57/1,031.20
  6. Step 6: Final answer
    x = 844.23

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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.