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Finding the Fourth Proportional to 266,095.80, 399,143.70 and 218,856.60

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Solution

The fourth proportional to 266,095.80, 399,143.70 and 218,856.60 is: 328,284.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,095.80 : 399,143.70 = 218,856.60 : x
  2. Step 2: Convert to fraction form
    266,095.80/399,143.70 = 218,856.60/x
  3. Step 3: Cross multiply
    266,095.80x = 399,143.70 × 218,856.60
  4. Step 4: Simplify right side
    266,095.80x = 87,355,233,093.42
  5. Step 5: Solve for x
    x = 87,355,233,093.42/266,095.80
  6. Step 6: Final answer
    x = 328,284.90

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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.