Home / 1,409.20-2,113.39-531.82

Finding the Fourth Proportional to 1,409.20, 2,113.39 and 531.82

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Solution

The fourth proportional to 1,409.20, 2,113.39 and 531.82 is: 797.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.20 : 2,113.39 = 531.82 : x
  2. Step 2: Convert to fraction form
    1,409.20/2,113.39 = 531.82/x
  3. Step 3: Cross multiply
    1,409.20x = 2,113.39 × 531.82
  4. Step 4: Simplify right side
    1,409.20x = 1,123,934.49
  5. Step 5: Solve for x
    x = 1,123,934.49/1,409.20
  6. Step 6: Final answer
    x = 797.57

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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.