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Finding the Fourth Proportional to 252,690.80, 378,575.40 and 205,689.20

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Solution

The fourth proportional to 252,690.80, 378,575.40 and 205,689.20 is: 308,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,690.80 : 378,575.40 = 205,689.20 : x
  2. Step 2: Convert to fraction form
    252,690.80/378,575.40 = 205,689.20/x
  3. Step 3: Cross multiply
    252,690.80x = 378,575.40 × 205,689.20
  4. Step 4: Simplify right side
    252,690.80x = 77,868,871,165.68
  5. Step 5: Solve for x
    x = 77,868,871,165.68/252,690.80
  6. Step 6: Final answer
    x = 308,158.71

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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.