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Finding the Fourth Proportional to 398,722.01, 550,249.65 and 217,443.83

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Solution

The fourth proportional to 398,722.01, 550,249.65 and 217,443.83 is: 300,079.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,722.01 : 550,249.65 = 217,443.83 : x
  2. Step 2: Convert to fraction form
    398,722.01/550,249.65 = 217,443.83/x
  3. Step 3: Cross multiply
    398,722.01x = 550,249.65 × 217,443.83
  4. Step 4: Simplify right side
    398,722.01x = 119,648,391,352.16
  5. Step 5: Solve for x
    x = 119,648,391,352.16/398,722.01
  6. Step 6: Final answer
    x = 300,079.73

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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.