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Finding the Fourth Proportional to 318,793.66, 439,803.23 and 189,706.30

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Solution

The fourth proportional to 318,793.66, 439,803.23 and 189,706.30 is: 261,716.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,793.66 : 439,803.23 = 189,706.30 : x
  2. Step 2: Convert to fraction form
    318,793.66/439,803.23 = 189,706.30/x
  3. Step 3: Cross multiply
    318,793.66x = 439,803.23 × 189,706.30
  4. Step 4: Simplify right side
    318,793.66x = 83,433,441,443.31
  5. Step 5: Solve for x
    x = 83,433,441,443.31/318,793.66
  6. Step 6: Final answer
    x = 261,716.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.