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Finding the Fourth Proportional to 266,475.60, 398,838.60 and 206,989.20

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Solution

The fourth proportional to 266,475.60, 398,838.60 and 206,989.20 is: 309,804.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,475.60 : 398,838.60 = 206,989.20 : x
  2. Step 2: Convert to fraction form
    266,475.60/398,838.60 = 206,989.20/x
  3. Step 3: Cross multiply
    266,475.60x = 398,838.60 × 206,989.20
  4. Step 4: Simplify right side
    266,475.60x = 82,555,282,743.12
  5. Step 5: Solve for x
    x = 82,555,282,743.12/266,475.60
  6. Step 6: Final answer
    x = 309,804.29

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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.