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Finding the Fourth Proportional to 399,443.80, 598,388.10 and 221,632.60

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Solution

The fourth proportional to 399,443.80, 598,388.10 and 221,632.60 is: 332,017.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,443.80 : 598,388.10 = 221,632.60 : x
  2. Step 2: Convert to fraction form
    399,443.80/598,388.10 = 221,632.60/x
  3. Step 3: Cross multiply
    399,443.80x = 598,388.10 × 221,632.60
  4. Step 4: Simplify right side
    399,443.80x = 132,622,310,412.06
  5. Step 5: Solve for x
    x = 132,622,310,412.06/399,443.80
  6. Step 6: Final answer
    x = 332,017.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.