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Finding the Fourth Proportional to 283,641.28, 391,419.68 and 154,580.81

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Solution

The fourth proportional to 283,641.28, 391,419.68 and 154,580.81 is: 213,318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,641.28 : 391,419.68 = 154,580.81 : x
  2. Step 2: Convert to fraction form
    283,641.28/391,419.68 = 154,580.81/x
  3. Step 3: Cross multiply
    283,641.28x = 391,419.68 × 154,580.81
  4. Step 4: Simplify right side
    283,641.28x = 60,505,968,454.34
  5. Step 5: Solve for x
    x = 60,505,968,454.34/283,641.28
  6. Step 6: Final answer
    x = 213,318.63

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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.