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Finding the Fourth Proportional to 278,656.20, 418,859.10 and 273,407.40

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Solution

The fourth proportional to 278,656.20, 418,859.10 and 273,407.40 is: 410,969.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,656.20 : 418,859.10 = 273,407.40 : x
  2. Step 2: Convert to fraction form
    278,656.20/418,859.10 = 273,407.40/x
  3. Step 3: Cross multiply
    278,656.20x = 418,859.10 × 273,407.40
  4. Step 4: Simplify right side
    278,656.20x = 114,519,177,497.34
  5. Step 5: Solve for x
    x = 114,519,177,497.34/278,656.20
  6. Step 6: Final answer
    x = 410,969.42

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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.