Home / 2,385.28-3,577.68-1,086.40

Finding the Fourth Proportional to 2,385.28, 3,577.68 and 1,086.40

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Solution

The fourth proportional to 2,385.28, 3,577.68 and 1,086.40 is: 1,629.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.28 : 3,577.68 = 1,086.40 : x
  2. Step 2: Convert to fraction form
    2,385.28/3,577.68 = 1,086.40/x
  3. Step 3: Cross multiply
    2,385.28x = 3,577.68 × 1,086.40
  4. Step 4: Simplify right side
    2,385.28x = 3,886,791.55
  5. Step 5: Solve for x
    x = 3,886,791.55/2,385.28
  6. Step 6: Final answer
    x = 1,629.49

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1.5x scale

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.