Home / 1,861.46-2,569.84-1,272.86

Finding the Fourth Proportional to 1,861.46, 2,569.84 and 1,272.86

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Solution

The fourth proportional to 1,861.46, 2,569.84 and 1,272.86 is: 1,757.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.46 : 2,569.84 = 1,272.86 : x
  2. Step 2: Convert to fraction form
    1,861.46/2,569.84 = 1,272.86/x
  3. Step 3: Cross multiply
    1,861.46x = 2,569.84 × 1,272.86
  4. Step 4: Simplify right side
    1,861.46x = 3,271,046.54
  5. Step 5: Solve for x
    x = 3,271,046.54/1,861.46
  6. Step 6: Final answer
    x = 1,757.25

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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.