Home / 4,459.80-6,689.77-1,687.78

Finding the Fourth Proportional to 4,459.80, 6,689.77 and 1,687.78

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Solution

The fourth proportional to 4,459.80, 6,689.77 and 1,687.78 is: 2,531.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,459.80 : 6,689.77 = 1,687.78 : x
  2. Step 2: Convert to fraction form
    4,459.80/6,689.77 = 1,687.78/x
  3. Step 3: Cross multiply
    4,459.80x = 6,689.77 × 1,687.78
  4. Step 4: Simplify right side
    4,459.80x = 11,290,839.07
  5. Step 5: Solve for x
    x = 11,290,839.07/4,459.80
  6. Step 6: Final answer
    x = 2,531.69

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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.