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Finding the Fourth Proportional to 389,578.95, 584,553.46 and 269,820.20

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Solution

The fourth proportional to 389,578.95, 584,553.46 and 269,820.20 is: 404,858.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,578.95 : 584,553.46 = 269,820.20 : x
  2. Step 2: Convert to fraction form
    389,578.95/584,553.46 = 269,820.20/x
  3. Step 3: Cross multiply
    389,578.95x = 584,553.46 × 269,820.20
  4. Step 4: Simplify right side
    389,578.95x = 157,724,329,492.53
  5. Step 5: Solve for x
    x = 157,724,329,492.53/389,578.95
  6. Step 6: Final answer
    x = 404,858.45

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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.