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Finding the Fourth Proportional to 261,785.70, 391,706.55 and 191,801.70

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Solution

The fourth proportional to 261,785.70, 391,706.55 and 191,801.70 is: 286,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,785.70 : 391,706.55 = 191,801.70 : x
  2. Step 2: Convert to fraction form
    261,785.70/391,706.55 = 191,801.70/x
  3. Step 3: Cross multiply
    261,785.70x = 391,706.55 × 191,801.70
  4. Step 4: Simplify right side
    261,785.70x = 75,129,982,191.14
  5. Step 5: Solve for x
    x = 75,129,982,191.14/261,785.70
  6. Step 6: Final answer
    x = 286,990.40

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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.