Home / 1,805.30-2,490.56-1,199.78

Finding the Fourth Proportional to 1,805.30, 2,490.56 and 1,199.78

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Solution

The fourth proportional to 1,805.30, 2,490.56 and 1,199.78 is: 1,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.30 : 2,490.56 = 1,199.78 : x
  2. Step 2: Convert to fraction form
    1,805.30/2,490.56 = 1,199.78/x
  3. Step 3: Cross multiply
    1,805.30x = 2,490.56 × 1,199.78
  4. Step 4: Simplify right side
    1,805.30x = 2,988,124.08
  5. Step 5: Solve for x
    x = 2,988,124.08/1,805.30
  6. Step 6: Final answer
    x = 1,655.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.