Home / 399,147.12-550,828.20-235,809

Finding the Fourth Proportional to 399,147.12, 550,828.20 and 235,809

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Solution

The fourth proportional to 399,147.12, 550,828.20 and 235,809 is: 325,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,147.12 : 550,828.20 = 235,809 : x
  2. Step 2: Convert to fraction form
    399,147.12/550,828.20 = 235,809/x
  3. Step 3: Cross multiply
    399,147.12x = 550,828.20 × 235,809
  4. Step 4: Simplify right side
    399,147.12x = 129,890,247,013.80
  5. Step 5: Solve for x
    x = 129,890,247,013.80/399,147.12
  6. Step 6: Final answer
    x = 325,419.48

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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.