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Finding the Fourth Proportional to 209,117.80, 313,676.70 and 207,951.40

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Solution

The fourth proportional to 209,117.80, 313,676.70 and 207,951.40 is: 311,927.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,117.80 : 313,676.70 = 207,951.40 : x
  2. Step 2: Convert to fraction form
    209,117.80/313,676.70 = 207,951.40/x
  3. Step 3: Cross multiply
    209,117.80x = 313,676.70 × 207,951.40
  4. Step 4: Simplify right side
    209,117.80x = 65,229,508,912.38
  5. Step 5: Solve for x
    x = 65,229,508,912.38/209,117.80
  6. Step 6: Final answer
    x = 311,927.10

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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.