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Finding the Fourth Proportional to 518,910.60, 777,782.70 and 266,093.40

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Solution

The fourth proportional to 518,910.60, 777,782.70 and 266,093.40 is: 398,841.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,910.60 : 777,782.70 = 266,093.40 : x
  2. Step 2: Convert to fraction form
    518,910.60/777,782.70 = 266,093.40/x
  3. Step 3: Cross multiply
    518,910.60x = 777,782.70 × 266,093.40
  4. Step 4: Simplify right side
    518,910.60x = 206,962,843,104.18
  5. Step 5: Solve for x
    x = 206,962,843,104.18/518,910.60
  6. Step 6: Final answer
    x = 398,841.04

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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.