Home / 1,131.80-1,697.30-351.70

Finding the Fourth Proportional to 1,131.80, 1,697.30 and 351.70

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Solution

The fourth proportional to 1,131.80, 1,697.30 and 351.70 is: 527.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.80 : 1,697.30 = 351.70 : x
  2. Step 2: Convert to fraction form
    1,131.80/1,697.30 = 351.70/x
  3. Step 3: Cross multiply
    1,131.80x = 1,697.30 × 351.70
  4. Step 4: Simplify right side
    1,131.80x = 596,934.41
  5. Step 5: Solve for x
    x = 596,934.41/1,131.80
  6. Step 6: Final answer
    x = 527.42

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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.