Home / 1,557.13-2,149.67-1,278.08

Finding the Fourth Proportional to 1,557.13, 2,149.67 and 1,278.08

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Solution

The fourth proportional to 1,557.13, 2,149.67 and 1,278.08 is: 1,764.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.13 : 2,149.67 = 1,278.08 : x
  2. Step 2: Convert to fraction form
    1,557.13/2,149.67 = 1,278.08/x
  3. Step 3: Cross multiply
    1,557.13x = 2,149.67 × 1,278.08
  4. Step 4: Simplify right side
    1,557.13x = 2,747,450.23
  5. Step 5: Solve for x
    x = 2,747,450.23/1,557.13
  6. Step 6: Final answer
    x = 1,764.43

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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.