Home / 318,979.12-440,099.85-189,809.64

Finding the Fourth Proportional to 318,979.12, 440,099.85 and 189,809.64

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Solution

The fourth proportional to 318,979.12, 440,099.85 and 189,809.64 is: 261,882.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,979.12 : 440,099.85 = 189,809.64 : x
  2. Step 2: Convert to fraction form
    318,979.12/440,099.85 = 189,809.64/x
  3. Step 3: Cross multiply
    318,979.12x = 440,099.85 × 189,809.64
  4. Step 4: Simplify right side
    318,979.12x = 83,535,194,092.55
  5. Step 5: Solve for x
    x = 83,535,194,092.55/318,979.12
  6. Step 6: Final answer
    x = 261,882.95

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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.