Home / 1,278.30-1,762.62-1,255.05

Finding the Fourth Proportional to 1,278.30, 1,762.62 and 1,255.05

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Solution

The fourth proportional to 1,278.30, 1,762.62 and 1,255.05 is: 1,730.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.30 : 1,762.62 = 1,255.05 : x
  2. Step 2: Convert to fraction form
    1,278.30/1,762.62 = 1,255.05/x
  3. Step 3: Cross multiply
    1,278.30x = 1,762.62 × 1,255.05
  4. Step 4: Simplify right side
    1,278.30x = 2,212,176.23
  5. Step 5: Solve for x
    x = 2,212,176.23/1,278.30
  6. Step 6: Final answer
    x = 1,730.56

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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.