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Finding the Fourth Proportional to 2,116.89, 3,174.93 and 818.19

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Solution

The fourth proportional to 2,116.89, 3,174.93 and 818.19 is: 1,227.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.89 : 3,174.93 = 818.19 : x
  2. Step 2: Convert to fraction form
    2,116.89/3,174.93 = 818.19/x
  3. Step 3: Cross multiply
    2,116.89x = 3,174.93 × 818.19
  4. Step 4: Simplify right side
    2,116.89x = 2,597,695.98
  5. Step 5: Solve for x
    x = 2,597,695.98/2,116.89
  6. Step 6: Final answer
    x = 1,227.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.