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Finding the Fourth Proportional to 279,301.20, 418,951.80 and 217,016.40

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Solution

The fourth proportional to 279,301.20, 418,951.80 and 217,016.40 is: 325,524.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,301.20 : 418,951.80 = 217,016.40 : x
  2. Step 2: Convert to fraction form
    279,301.20/418,951.80 = 217,016.40/x
  3. Step 3: Cross multiply
    279,301.20x = 418,951.80 × 217,016.40
  4. Step 4: Simplify right side
    279,301.20x = 90,919,411,409.52
  5. Step 5: Solve for x
    x = 90,919,411,409.52/279,301.20
  6. Step 6: Final answer
    x = 325,524.60

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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.