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Finding the Fourth Proportional to 279,227.80, 418,841.70 and 172,939.60

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Solution

The fourth proportional to 279,227.80, 418,841.70 and 172,939.60 is: 259,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,227.80 : 418,841.70 = 172,939.60 : x
  2. Step 2: Convert to fraction form
    279,227.80/418,841.70 = 172,939.60/x
  3. Step 3: Cross multiply
    279,227.80x = 418,841.70 × 172,939.60
  4. Step 4: Simplify right side
    279,227.80x = 72,434,316,061.32
  5. Step 5: Solve for x
    x = 72,434,316,061.32/279,227.80
  6. Step 6: Final answer
    x = 259,409.40

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1.5x scale

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.