Home / 1,939.18-2,675.20-1,152.78

Finding the Fourth Proportional to 1,939.18, 2,675.20 and 1,152.78

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Solution

The fourth proportional to 1,939.18, 2,675.20 and 1,152.78 is: 1,590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.18 : 2,675.20 = 1,152.78 : x
  2. Step 2: Convert to fraction form
    1,939.18/2,675.20 = 1,152.78/x
  3. Step 3: Cross multiply
    1,939.18x = 2,675.20 × 1,152.78
  4. Step 4: Simplify right side
    1,939.18x = 3,083,917.06
  5. Step 5: Solve for x
    x = 3,083,917.06/1,939.18
  6. Step 6: Final answer
    x = 1,590.32

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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.