Home / 209,456.41-311,815.75-208,211.04

Finding the Fourth Proportional to 209,456.41, 311,815.75 and 208,211.04

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Solution

The fourth proportional to 209,456.41, 311,815.75 and 208,211.04 is: 309,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,456.41 : 311,815.75 = 208,211.04 : x
  2. Step 2: Convert to fraction form
    209,456.41/311,815.75 = 208,211.04/x
  3. Step 3: Cross multiply
    209,456.41x = 311,815.75 × 208,211.04
  4. Step 4: Simplify right side
    209,456.41x = 64,923,481,595.88
  5. Step 5: Solve for x
    x = 64,923,481,595.88/209,456.41
  6. Step 6: Final answer
    x = 309,961.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.