Home / 1,248.20-1,873.66-518.28

Finding the Fourth Proportional to 1,248.20, 1,873.66 and 518.28

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Solution

The fourth proportional to 1,248.20, 1,873.66 and 518.28 is: 777.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.20 : 1,873.66 = 518.28 : x
  2. Step 2: Convert to fraction form
    1,248.20/1,873.66 = 518.28/x
  3. Step 3: Cross multiply
    1,248.20x = 1,873.66 × 518.28
  4. Step 4: Simplify right side
    1,248.20x = 971,077.91
  5. Step 5: Solve for x
    x = 971,077.91/1,248.20
  6. Step 6: Final answer
    x = 777.99

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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.