Home / 1,245.76-1,868.16-515.14

Finding the Fourth Proportional to 1,245.76, 1,868.16 and 515.14

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Solution

The fourth proportional to 1,245.76, 1,868.16 and 515.14 is: 772.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.76 : 1,868.16 = 515.14 : x
  2. Step 2: Convert to fraction form
    1,245.76/1,868.16 = 515.14/x
  3. Step 3: Cross multiply
    1,245.76x = 1,868.16 × 515.14
  4. Step 4: Simplify right side
    1,245.76x = 962,363.94
  5. Step 5: Solve for x
    x = 962,363.94/1,245.76
  6. Step 6: Final answer
    x = 772.51

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1.5x scale

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.