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Finding the Fourth Proportional to 207,961.40, 311,358.90 and 202,129.40

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Solution

The fourth proportional to 207,961.40, 311,358.90 and 202,129.40 is: 302,627.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,961.40 : 311,358.90 = 202,129.40 : x
  2. Step 2: Convert to fraction form
    207,961.40/311,358.90 = 202,129.40/x
  3. Step 3: Cross multiply
    207,961.40x = 311,358.90 × 202,129.40
  4. Step 4: Simplify right side
    207,961.40x = 62,934,787,641.66
  5. Step 5: Solve for x
    x = 62,934,787,641.66/207,961.40
  6. Step 6: Final answer
    x = 302,627.26

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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.