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Finding the Fourth Proportional to 398,797.08, 550,337.85 and 217,505.76

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Solution

The fourth proportional to 398,797.08, 550,337.85 and 217,505.76 is: 300,156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,797.08 : 550,337.85 = 217,505.76 : x
  2. Step 2: Convert to fraction form
    398,797.08/550,337.85 = 217,505.76/x
  3. Step 3: Cross multiply
    398,797.08x = 550,337.85 × 217,505.76
  4. Step 4: Simplify right side
    398,797.08x = 119,701,652,321.02
  5. Step 5: Solve for x
    x = 119,701,652,321.02/398,797.08
  6. Step 6: Final answer
    x = 300,156.79

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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.