Home / 2,138.80-2,951.53-1,242.47

Finding the Fourth Proportional to 2,138.80, 2,951.53 and 1,242.47

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Solution

The fourth proportional to 2,138.80, 2,951.53 and 1,242.47 is: 1,714.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.80 : 2,951.53 = 1,242.47 : x
  2. Step 2: Convert to fraction form
    2,138.80/2,951.53 = 1,242.47/x
  3. Step 3: Cross multiply
    2,138.80x = 2,951.53 × 1,242.47
  4. Step 4: Simplify right side
    2,138.80x = 3,667,187.48
  5. Step 5: Solve for x
    x = 3,667,187.48/2,138.80
  6. Step 6: Final answer
    x = 1,714.60

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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.