Home / 2,139.32-2,951.70-1,242.74

Finding the Fourth Proportional to 2,139.32, 2,951.70 and 1,242.74

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Solution

The fourth proportional to 2,139.32, 2,951.70 and 1,242.74 is: 1,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.32 : 2,951.70 = 1,242.74 : x
  2. Step 2: Convert to fraction form
    2,139.32/2,951.70 = 1,242.74/x
  3. Step 3: Cross multiply
    2,139.32x = 2,951.70 × 1,242.74
  4. Step 4: Simplify right side
    2,139.32x = 3,668,195.66
  5. Step 5: Solve for x
    x = 3,668,195.66/2,139.32
  6. Step 6: Final answer
    x = 1,714.65

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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.