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Finding the Fourth Proportional to 398,833.89, 550,398.26 and 217,552.30

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Solution

The fourth proportional to 398,833.89, 550,398.26 and 217,552.30 is: 300,226.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,833.89 : 550,398.26 = 217,552.30 : x
  2. Step 2: Convert to fraction form
    398,833.89/550,398.26 = 217,552.30/x
  3. Step 3: Cross multiply
    398,833.89x = 550,398.26 × 217,552.30
  4. Step 4: Simplify right side
    398,833.89x = 119,740,406,546.88
  5. Step 5: Solve for x
    x = 119,740,406,546.88/398,833.89
  6. Step 6: Final answer
    x = 300,226.26

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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.