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Finding the Fourth Proportional to 389,428.83, 584,680.88 and 269,189.39

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Solution

The fourth proportional to 389,428.83, 584,680.88 and 269,189.39 is: 404,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,428.83 : 584,680.88 = 269,189.39 : x
  2. Step 2: Convert to fraction form
    389,428.83/584,680.88 = 269,189.39/x
  3. Step 3: Cross multiply
    389,428.83x = 584,680.88 × 269,189.39
  4. Step 4: Simplify right side
    389,428.83x = 157,389,891,566.54
  5. Step 5: Solve for x
    x = 157,389,891,566.54/389,428.83
  6. Step 6: Final answer
    x = 404,155.73

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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.