Home / 2,817.72-4,225.86-1,278.36

Finding the Fourth Proportional to 2,817.72, 4,225.86 and 1,278.36

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Solution

The fourth proportional to 2,817.72, 4,225.86 and 1,278.36 is: 1,917.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.72 : 4,225.86 = 1,278.36 : x
  2. Step 2: Convert to fraction form
    2,817.72/4,225.86 = 1,278.36/x
  3. Step 3: Cross multiply
    2,817.72x = 4,225.86 × 1,278.36
  4. Step 4: Simplify right side
    2,817.72x = 5,402,170.39
  5. Step 5: Solve for x
    x = 5,402,170.39/2,817.72
  6. Step 6: Final answer
    x = 1,917.21

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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.