Home / 2,261.84-3,121.67-1,317.78

Finding the Fourth Proportional to 2,261.84, 3,121.67 and 1,317.78

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Solution

The fourth proportional to 2,261.84, 3,121.67 and 1,317.78 is: 1,818.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.84 : 3,121.67 = 1,317.78 : x
  2. Step 2: Convert to fraction form
    2,261.84/3,121.67 = 1,317.78/x
  3. Step 3: Cross multiply
    2,261.84x = 3,121.67 × 1,317.78
  4. Step 4: Simplify right side
    2,261.84x = 4,113,677.59
  5. Step 5: Solve for x
    x = 4,113,677.59/2,261.84
  6. Step 6: Final answer
    x = 1,818.73

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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.