Home / 3,125.96-4,689.06-1,278.96

Finding the Fourth Proportional to 3,125.96, 4,689.06 and 1,278.96

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Solution

The fourth proportional to 3,125.96, 4,689.06 and 1,278.96 is: 1,918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.96 : 4,689.06 = 1,278.96 : x
  2. Step 2: Convert to fraction form
    3,125.96/4,689.06 = 1,278.96/x
  3. Step 3: Cross multiply
    3,125.96x = 4,689.06 × 1,278.96
  4. Step 4: Simplify right side
    3,125.96x = 5,997,120.18
  5. Step 5: Solve for x
    x = 5,997,120.18/3,125.96
  6. Step 6: Final answer
    x = 1,918.49

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Double scale
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Similar ratio
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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.