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Finding the Fourth Proportional to 398,808.25, 550,361.95 and 217,520.19

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Solution

The fourth proportional to 398,808.25, 550,361.95 and 217,520.19 is: 300,181.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,808.25 : 550,361.95 = 217,520.19 : x
  2. Step 2: Convert to fraction form
    398,808.25/550,361.95 = 217,520.19/x
  3. Step 3: Cross multiply
    398,808.25x = 550,361.95 × 217,520.19
  4. Step 4: Simplify right side
    398,808.25x = 119,714,835,388.97
  5. Step 5: Solve for x
    x = 119,714,835,388.97/398,808.25
  6. Step 6: Final answer
    x = 300,181.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.