Home / 1,256.75-1,885.59-1,155.61

Finding the Fourth Proportional to 1,256.75, 1,885.59 and 1,155.61

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Solution

The fourth proportional to 1,256.75, 1,885.59 and 1,155.61 is: 1,733.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.75 : 1,885.59 = 1,155.61 : x
  2. Step 2: Convert to fraction form
    1,256.75/1,885.59 = 1,155.61/x
  3. Step 3: Cross multiply
    1,256.75x = 1,885.59 × 1,155.61
  4. Step 4: Simplify right side
    1,256.75x = 2,178,991.45
  5. Step 5: Solve for x
    x = 2,178,991.45/1,256.75
  6. Step 6: Final answer
    x = 1,733.83

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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.