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Finding the Fourth Proportional to 260,839.40, 391,431.90 and 148,519.40

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Solution

The fourth proportional to 260,839.40, 391,431.90 and 148,519.40 is: 222,877.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,839.40 : 391,431.90 = 148,519.40 : x
  2. Step 2: Convert to fraction form
    260,839.40/391,431.90 = 148,519.40/x
  3. Step 3: Cross multiply
    260,839.40x = 391,431.90 × 148,519.40
  4. Step 4: Simplify right side
    260,839.40x = 58,135,230,928.86
  5. Step 5: Solve for x
    x = 58,135,230,928.86/260,839.40
  6. Step 6: Final answer
    x = 222,877.49

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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.