Home / 1,612.28-2,223.90-1,238.70

Finding the Fourth Proportional to 1,612.28, 2,223.90 and 1,238.70

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Solution

The fourth proportional to 1,612.28, 2,223.90 and 1,238.70 is: 1,708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.28 : 2,223.90 = 1,238.70 : x
  2. Step 2: Convert to fraction form
    1,612.28/2,223.90 = 1,238.70/x
  3. Step 3: Cross multiply
    1,612.28x = 2,223.90 × 1,238.70
  4. Step 4: Simplify right side
    1,612.28x = 2,754,744.93
  5. Step 5: Solve for x
    x = 2,754,744.93/1,612.28
  6. Step 6: Final answer
    x = 1,708.60

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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.