Home / 1,257.64-1,885.55-845.75

Finding the Fourth Proportional to 1,257.64, 1,885.55 and 845.75

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Solution

The fourth proportional to 1,257.64, 1,885.55 and 845.75 is: 1,268.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.64 : 1,885.55 = 845.75 : x
  2. Step 2: Convert to fraction form
    1,257.64/1,885.55 = 845.75/x
  3. Step 3: Cross multiply
    1,257.64x = 1,885.55 × 845.75
  4. Step 4: Simplify right side
    1,257.64x = 1,594,704.40
  5. Step 5: Solve for x
    x = 1,594,704.40/1,257.64
  6. Step 6: Final answer
    x = 1,268.02

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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.