Home / 661,081.08-991,645.10-211,743.56

Finding the Fourth Proportional to 661,081.08, 991,645.10 and 211,743.56

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Solution

The fourth proportional to 661,081.08, 991,645.10 and 211,743.56 is: 317,622.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,081.08 : 991,645.10 = 211,743.56 : x
  2. Step 2: Convert to fraction form
    661,081.08/991,645.10 = 211,743.56/x
  3. Step 3: Cross multiply
    661,081.08x = 991,645.10 × 211,743.56
  4. Step 4: Simplify right side
    661,081.08x = 209,974,463,730.56
  5. Step 5: Solve for x
    x = 209,974,463,730.56/661,081.08
  6. Step 6: Final answer
    x = 317,622.86

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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.