Home / 1,440.38-2,160.34-515.80

Finding the Fourth Proportional to 1,440.38, 2,160.34 and 515.80

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Solution

The fourth proportional to 1,440.38, 2,160.34 and 515.80 is: 773.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.38 : 2,160.34 = 515.80 : x
  2. Step 2: Convert to fraction form
    1,440.38/2,160.34 = 515.80/x
  3. Step 3: Cross multiply
    1,440.38x = 2,160.34 × 515.80
  4. Step 4: Simplify right side
    1,440.38x = 1,114,304.78
  5. Step 5: Solve for x
    x = 1,114,304.78/1,440.38
  6. Step 6: Final answer
    x = 773.62

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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.