Home / 2,659.36-3,988.32-1,120

Finding the Fourth Proportional to 2,659.36, 3,988.32 and 1,120

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Solution

The fourth proportional to 2,659.36, 3,988.32 and 1,120 is: 1,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.36 : 3,988.32 = 1,120 : x
  2. Step 2: Convert to fraction form
    2,659.36/3,988.32 = 1,120/x
  3. Step 3: Cross multiply
    2,659.36x = 3,988.32 × 1,120
  4. Step 4: Simplify right side
    2,659.36x = 4,466,918.40
  5. Step 5: Solve for x
    x = 4,466,918.40/2,659.36
  6. Step 6: Final answer
    x = 1,679.70

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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.