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Finding the Fourth Proportional to 426,336.60, 639,735.30 and 189,715.80

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Solution

The fourth proportional to 426,336.60, 639,735.30 and 189,715.80 is: 284,676.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,336.60 : 639,735.30 = 189,715.80 : x
  2. Step 2: Convert to fraction form
    426,336.60/639,735.30 = 189,715.80/x
  3. Step 3: Cross multiply
    426,336.60x = 639,735.30 × 189,715.80
  4. Step 4: Simplify right side
    426,336.60x = 121,367,894,227.74
  5. Step 5: Solve for x
    x = 121,367,894,227.74/426,336.60
  6. Step 6: Final answer
    x = 284,676.23

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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.