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Finding the Fourth Proportional to 420,170.50, 579,843.18 and 229,190.71

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Solution

The fourth proportional to 420,170.50, 579,843.18 and 229,190.71 is: 316,287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,170.50 : 579,843.18 = 229,190.71 : x
  2. Step 2: Convert to fraction form
    420,170.50/579,843.18 = 229,190.71/x
  3. Step 3: Cross multiply
    420,170.50x = 579,843.18 × 229,190.71
  4. Step 4: Simplify right side
    420,170.50x = 132,894,670,112.86
  5. Step 5: Solve for x
    x = 132,894,670,112.86/420,170.50
  6. Step 6: Final answer
    x = 316,287.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.