Home / 1,245.60-1,869.30-515.16

Finding the Fourth Proportional to 1,245.60, 1,869.30 and 515.16

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Solution

The fourth proportional to 1,245.60, 1,869.30 and 515.16 is: 773.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.60 : 1,869.30 = 515.16 : x
  2. Step 2: Convert to fraction form
    1,245.60/1,869.30 = 515.16/x
  3. Step 3: Cross multiply
    1,245.60x = 1,869.30 × 515.16
  4. Step 4: Simplify right side
    1,245.60x = 962,988.59
  5. Step 5: Solve for x
    x = 962,988.59/1,245.60
  6. Step 6: Final answer
    x = 773.11

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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.