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Finding the Fourth Proportional to 279,246.80, 418,870.20 and 172,958.60

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Solution

The fourth proportional to 279,246.80, 418,870.20 and 172,958.60 is: 259,437.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,246.80 : 418,870.20 = 172,958.60 : x
  2. Step 2: Convert to fraction form
    279,246.80/418,870.20 = 172,958.60/x
  3. Step 3: Cross multiply
    279,246.80x = 418,870.20 × 172,958.60
  4. Step 4: Simplify right side
    279,246.80x = 72,447,203,373.72
  5. Step 5: Solve for x
    x = 72,447,203,373.72/279,246.80
  6. Step 6: Final answer
    x = 259,437.90

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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.