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Finding the Fourth Proportional to 278,675.40, 418,013.10 and 194,694.60

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Solution

The fourth proportional to 278,675.40, 418,013.10 and 194,694.60 is: 292,041.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,675.40 : 418,013.10 = 194,694.60 : x
  2. Step 2: Convert to fraction form
    278,675.40/418,013.10 = 194,694.60/x
  3. Step 3: Cross multiply
    278,675.40x = 418,013.10 × 194,694.60
  4. Step 4: Simplify right side
    278,675.40x = 81,384,893,299.26
  5. Step 5: Solve for x
    x = 81,384,893,299.26/278,675.40
  6. Step 6: Final answer
    x = 292,041.90

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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.