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Finding the Fourth Proportional to 398,725.02, 550,253.79 and 217,446.84

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Solution

The fourth proportional to 398,725.02, 550,253.79 and 217,446.84 is: 300,083.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,725.02 : 550,253.79 = 217,446.84 : x
  2. Step 2: Convert to fraction form
    398,725.02/550,253.79 = 217,446.84/x
  3. Step 3: Cross multiply
    398,725.02x = 550,253.79 × 217,446.84
  4. Step 4: Simplify right side
    398,725.02x = 119,650,947,833.52
  5. Step 5: Solve for x
    x = 119,650,947,833.52/398,725.02
  6. Step 6: Final answer
    x = 300,083.87

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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.