Home / 3,086.52-4,259.38-1,689.28

Finding the Fourth Proportional to 3,086.52, 4,259.38 and 1,689.28

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Solution

The fourth proportional to 3,086.52, 4,259.38 and 1,689.28 is: 2,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.52 : 4,259.38 = 1,689.28 : x
  2. Step 2: Convert to fraction form
    3,086.52/4,259.38 = 1,689.28/x
  3. Step 3: Cross multiply
    3,086.52x = 4,259.38 × 1,689.28
  4. Step 4: Simplify right side
    3,086.52x = 7,195,285.45
  5. Step 5: Solve for x
    x = 7,195,285.45/3,086.52
  6. Step 6: Final answer
    x = 2,331.20

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1.5x scale

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.