Home / 1,556.78-2,147.40-926.88

Finding the Fourth Proportional to 1,556.78, 2,147.40 and 926.88

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Solution

The fourth proportional to 1,556.78, 2,147.40 and 926.88 is: 1,278.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.78 : 2,147.40 = 926.88 : x
  2. Step 2: Convert to fraction form
    1,556.78/2,147.40 = 926.88/x
  3. Step 3: Cross multiply
    1,556.78x = 2,147.40 × 926.88
  4. Step 4: Simplify right side
    1,556.78x = 1,990,382.11
  5. Step 5: Solve for x
    x = 1,990,382.11/1,556.78
  6. Step 6: Final answer
    x = 1,278.53

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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.