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Finding the Fourth Proportional to 393,350, 542,869.60 and 223,609.68

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Solution

The fourth proportional to 393,350, 542,869.60 and 223,609.68 is: 308,607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,350 : 542,869.60 = 223,609.68 : x
  2. Step 2: Convert to fraction form
    393,350/542,869.60 = 223,609.68/x
  3. Step 3: Cross multiply
    393,350x = 542,869.60 × 223,609.68
  4. Step 4: Simplify right side
    393,350x = 121,390,897,537.73
  5. Step 5: Solve for x
    x = 121,390,897,537.73/393,350
  6. Step 6: Final answer
    x = 308,607.85

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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.