Home / 1,439.55-2,160.39-515.13

Finding the Fourth Proportional to 1,439.55, 2,160.39 and 515.13

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Solution

The fourth proportional to 1,439.55, 2,160.39 and 515.13 is: 773.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.55 : 2,160.39 = 515.13 : x
  2. Step 2: Convert to fraction form
    1,439.55/2,160.39 = 515.13/x
  3. Step 3: Cross multiply
    1,439.55x = 2,160.39 × 515.13
  4. Step 4: Simplify right side
    1,439.55x = 1,112,881.70
  5. Step 5: Solve for x
    x = 1,112,881.70/1,439.55
  6. Step 6: Final answer
    x = 773.08

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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.