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Finding the Fourth Proportional to 393,187.80, 590,219.10 and 216,040.80

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Solution

The fourth proportional to 393,187.80, 590,219.10 and 216,040.80 is: 324,301.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,187.80 : 590,219.10 = 216,040.80 : x
  2. Step 2: Convert to fraction form
    393,187.80/590,219.10 = 216,040.80/x
  3. Step 3: Cross multiply
    393,187.80x = 590,219.10 × 216,040.80
  4. Step 4: Simplify right side
    393,187.80x = 127,511,406,539.28
  5. Step 5: Solve for x
    x = 127,511,406,539.28/393,187.80
  6. Step 6: Final answer
    x = 324,301.53

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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.