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Finding the Fourth Proportional to 207,918.30, 311,440.05 and 172,926.30

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Solution

The fourth proportional to 207,918.30, 311,440.05 and 172,926.30 is: 259,025.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,918.30 : 311,440.05 = 172,926.30 : x
  2. Step 2: Convert to fraction form
    207,918.30/311,440.05 = 172,926.30/x
  3. Step 3: Cross multiply
    207,918.30x = 311,440.05 × 172,926.30
  4. Step 4: Simplify right side
    207,918.30x = 53,856,175,518.32
  5. Step 5: Solve for x
    x = 53,856,175,518.32/207,918.30
  6. Step 6: Final answer
    x = 259,025.66

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1.5x scale

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.