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Finding the Fourth Proportional to 509,868.60, 764,778.60 and 172,876.20

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Solution

The fourth proportional to 509,868.60, 764,778.60 and 172,876.20 is: 259,306.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,868.60 : 764,778.60 = 172,876.20 : x
  2. Step 2: Convert to fraction form
    509,868.60/764,778.60 = 172,876.20/x
  3. Step 3: Cross multiply
    509,868.60x = 764,778.60 × 172,876.20
  4. Step 4: Simplify right side
    509,868.60x = 132,212,018,209.32
  5. Step 5: Solve for x
    x = 132,212,018,209.32/509,868.60
  6. Step 6: Final answer
    x = 259,306.06

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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.