Home / 3,087.12-4,260.16-1,689.88

Finding the Fourth Proportional to 3,087.12, 4,260.16 and 1,689.88

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Solution

The fourth proportional to 3,087.12, 4,260.16 and 1,689.88 is: 2,332.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.12 : 4,260.16 = 1,689.88 : x
  2. Step 2: Convert to fraction form
    3,087.12/4,260.16 = 1,689.88/x
  3. Step 3: Cross multiply
    3,087.12x = 4,260.16 × 1,689.88
  4. Step 4: Simplify right side
    3,087.12x = 7,199,159.18
  5. Step 5: Solve for x
    x = 7,199,159.18/3,087.12
  6. Step 6: Final answer
    x = 2,332.00

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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.