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Finding the Fourth Proportional to 3,897, 5,378.18 and 2,218.96

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Solution

The fourth proportional to 3,897, 5,378.18 and 2,218.96 is: 3,062.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897 : 5,378.18 = 2,218.96 : x
  2. Step 2: Convert to fraction form
    3,897/5,378.18 = 2,218.96/x
  3. Step 3: Cross multiply
    3,897x = 5,378.18 × 2,218.96
  4. Step 4: Simplify right side
    3,897x = 11,933,966.29
  5. Step 5: Solve for x
    x = 11,933,966.29/3,897
  6. Step 6: Final answer
    x = 3,062.35

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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.