Home / 2,103.14-2,902.21-1,218.88

Finding the Fourth Proportional to 2,103.14, 2,902.21 and 1,218.88

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Solution

The fourth proportional to 2,103.14, 2,902.21 and 1,218.88 is: 1,681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.14 : 2,902.21 = 1,218.88 : x
  2. Step 2: Convert to fraction form
    2,103.14/2,902.21 = 1,218.88/x
  3. Step 3: Cross multiply
    2,103.14x = 2,902.21 × 1,218.88
  4. Step 4: Simplify right side
    2,103.14x = 3,537,445.72
  5. Step 5: Solve for x
    x = 3,537,445.72/2,103.14
  6. Step 6: Final answer
    x = 1,681.98

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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.