Home / 1,245.18-1,868.27-515.26

Finding the Fourth Proportional to 1,245.18, 1,868.27 and 515.26

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Solution

The fourth proportional to 1,245.18, 1,868.27 and 515.26 is: 773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.18 : 1,868.27 = 515.26 : x
  2. Step 2: Convert to fraction form
    1,245.18/1,868.27 = 515.26/x
  3. Step 3: Cross multiply
    1,245.18x = 1,868.27 × 515.26
  4. Step 4: Simplify right side
    1,245.18x = 962,644.80
  5. Step 5: Solve for x
    x = 962,644.80/1,245.18
  6. Step 6: Final answer
    x = 773.10

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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.