Home / 285,072.50-428,162.34-209,895.74

Finding the Fourth Proportional to 285,072.50, 428,162.34 and 209,895.74

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Solution

The fourth proportional to 285,072.50, 428,162.34 and 209,895.74 is: 315,251.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,072.50 : 428,162.34 = 209,895.74 : x
  2. Step 2: Convert to fraction form
    285,072.50/428,162.34 = 209,895.74/x
  3. Step 3: Cross multiply
    285,072.50x = 428,162.34 × 209,895.74
  4. Step 4: Simplify right side
    285,072.50x = 89,869,451,194.43
  5. Step 5: Solve for x
    x = 89,869,451,194.43/285,072.50
  6. Step 6: Final answer
    x = 315,251.21

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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.