Home / 2,079.12-3,117.60-1,308

Finding the Fourth Proportional to 2,079.12, 3,117.60 and 1,308

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Solution

The fourth proportional to 2,079.12, 3,117.60 and 1,308 is: 1,961.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.12 : 3,117.60 = 1,308 : x
  2. Step 2: Convert to fraction form
    2,079.12/3,117.60 = 1,308/x
  3. Step 3: Cross multiply
    2,079.12x = 3,117.60 × 1,308
  4. Step 4: Simplify right side
    2,079.12x = 4,077,820.80
  5. Step 5: Solve for x
    x = 4,077,820.80/2,079.12
  6. Step 6: Final answer
    x = 1,961.32

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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.