Home / 1,143.20-1,577.88-677.36

Finding the Fourth Proportional to 1,143.20, 1,577.88 and 677.36

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Solution

The fourth proportional to 1,143.20, 1,577.88 and 677.36 is: 934.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.20 : 1,577.88 = 677.36 : x
  2. Step 2: Convert to fraction form
    1,143.20/1,577.88 = 677.36/x
  3. Step 3: Cross multiply
    1,143.20x = 1,577.88 × 677.36
  4. Step 4: Simplify right side
    1,143.20x = 1,068,792.80
  5. Step 5: Solve for x
    x = 1,068,792.80/1,143.20
  6. Step 6: Final answer
    x = 934.91

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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.