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Finding the Fourth Proportional to 261,331.20, 391,593.60 and 194,457.60

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Solution

The fourth proportional to 261,331.20, 391,593.60 and 194,457.60 is: 291,386.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,331.20 : 391,593.60 = 194,457.60 : x
  2. Step 2: Convert to fraction form
    261,331.20/391,593.60 = 194,457.60/x
  3. Step 3: Cross multiply
    261,331.20x = 391,593.60 × 194,457.60
  4. Step 4: Simplify right side
    261,331.20x = 76,148,351,631.36
  5. Step 5: Solve for x
    x = 76,148,351,631.36/261,331.20
  6. Step 6: Final answer
    x = 291,386.38

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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.