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Finding the Fourth Proportional to 426,337.60, 639,736.80 and 189,716.80

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Solution

The fourth proportional to 426,337.60, 639,736.80 and 189,716.80 is: 284,677.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,337.60 : 639,736.80 = 189,716.80 : x
  2. Step 2: Convert to fraction form
    426,337.60/639,736.80 = 189,716.80/x
  3. Step 3: Cross multiply
    426,337.60x = 639,736.80 × 189,716.80
  4. Step 4: Simplify right side
    426,337.60x = 121,368,818,538.24
  5. Step 5: Solve for x
    x = 121,368,818,538.24/426,337.60
  6. Step 6: Final answer
    x = 284,677.73

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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.