Home / 1,245.93-1,869.09-515.10

Finding the Fourth Proportional to 1,245.93, 1,869.09 and 515.10

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Solution

The fourth proportional to 1,245.93, 1,869.09 and 515.10 is: 772.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.93 : 1,869.09 = 515.10 : x
  2. Step 2: Convert to fraction form
    1,245.93/1,869.09 = 515.10/x
  3. Step 3: Cross multiply
    1,245.93x = 1,869.09 × 515.10
  4. Step 4: Simplify right side
    1,245.93x = 962,768.26
  5. Step 5: Solve for x
    x = 962,768.26/1,245.93
  6. Step 6: Final answer
    x = 772.73

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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.