Home / 2,218.39-3,061.40-1,223.70

Finding the Fourth Proportional to 2,218.39, 3,061.40 and 1,223.70

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Solution

The fourth proportional to 2,218.39, 3,061.40 and 1,223.70 is: 1,688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.39 : 3,061.40 = 1,223.70 : x
  2. Step 2: Convert to fraction form
    2,218.39/3,061.40 = 1,223.70/x
  3. Step 3: Cross multiply
    2,218.39x = 3,061.40 × 1,223.70
  4. Step 4: Simplify right side
    2,218.39x = 3,746,241.68
  5. Step 5: Solve for x
    x = 3,746,241.68/2,218.39
  6. Step 6: Final answer
    x = 1,688.72

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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.