Home / 1,214.60-1,832.75-1,128.20

Finding the Fourth Proportional to 1,214.60, 1,832.75 and 1,128.20

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Solution

The fourth proportional to 1,214.60, 1,832.75 and 1,128.20 is: 1,702.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.60 : 1,832.75 = 1,128.20 : x
  2. Step 2: Convert to fraction form
    1,214.60/1,832.75 = 1,128.20/x
  3. Step 3: Cross multiply
    1,214.60x = 1,832.75 × 1,128.20
  4. Step 4: Simplify right side
    1,214.60x = 2,067,708.55
  5. Step 5: Solve for x
    x = 2,067,708.55/1,214.60
  6. Step 6: Final answer
    x = 1,702.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.