Home / 1,276.38-1,764.86-1,217.25

Finding the Fourth Proportional to 1,276.38, 1,764.86 and 1,217.25

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Solution

The fourth proportional to 1,276.38, 1,764.86 and 1,217.25 is: 1,683.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.38 : 1,764.86 = 1,217.25 : x
  2. Step 2: Convert to fraction form
    1,276.38/1,764.86 = 1,217.25/x
  3. Step 3: Cross multiply
    1,276.38x = 1,764.86 × 1,217.25
  4. Step 4: Simplify right side
    1,276.38x = 2,148,269.75
  5. Step 5: Solve for x
    x = 2,148,269.75/1,276.38
  6. Step 6: Final answer
    x = 1,683.10

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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.