Home / 1,277.78-1,927.30-1,125.61

Finding the Fourth Proportional to 1,277.78, 1,927.30 and 1,125.61

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Solution

The fourth proportional to 1,277.78, 1,927.30 and 1,125.61 is: 1,697.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.78 : 1,927.30 = 1,125.61 : x
  2. Step 2: Convert to fraction form
    1,277.78/1,927.30 = 1,125.61/x
  3. Step 3: Cross multiply
    1,277.78x = 1,927.30 × 1,125.61
  4. Step 4: Simplify right side
    1,277.78x = 2,169,388.15
  5. Step 5: Solve for x
    x = 2,169,388.15/1,277.78
  6. Step 6: Final answer
    x = 1,697.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.