Home / 2,218.59-3,061.65-1,223.86

Finding the Fourth Proportional to 2,218.59, 3,061.65 and 1,223.86

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Solution

The fourth proportional to 2,218.59, 3,061.65 and 1,223.86 is: 1,688.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.59 : 3,061.65 = 1,223.86 : x
  2. Step 2: Convert to fraction form
    2,218.59/3,061.65 = 1,223.86/x
  3. Step 3: Cross multiply
    2,218.59x = 3,061.65 × 1,223.86
  4. Step 4: Simplify right side
    2,218.59x = 3,747,026.76
  5. Step 5: Solve for x
    x = 3,747,026.76/2,218.59
  6. Step 6: Final answer
    x = 1,688.92

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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.