Home / 1,555.28-2,332.20-689.84

Finding the Fourth Proportional to 1,555.28, 2,332.20 and 689.84

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Solution

The fourth proportional to 1,555.28, 2,332.20 and 689.84 is: 1,034.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.28 : 2,332.20 = 689.84 : x
  2. Step 2: Convert to fraction form
    1,555.28/2,332.20 = 689.84/x
  3. Step 3: Cross multiply
    1,555.28x = 2,332.20 × 689.84
  4. Step 4: Simplify right side
    1,555.28x = 1,608,844.85
  5. Step 5: Solve for x
    x = 1,608,844.85/1,555.28
  6. Step 6: Final answer
    x = 1,034.44

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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.