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Finding the Fourth Proportional to 605,401.80, 907,665.30 and 339,243.90

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Solution

The fourth proportional to 605,401.80, 907,665.30 and 339,243.90 is: 508,620.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,401.80 : 907,665.30 = 339,243.90 : x
  2. Step 2: Convert to fraction form
    605,401.80/907,665.30 = 339,243.90/x
  3. Step 3: Cross multiply
    605,401.80x = 907,665.30 × 339,243.90
  4. Step 4: Simplify right side
    605,401.80x = 307,919,916,266.67
  5. Step 5: Solve for x
    x = 307,919,916,266.67/605,401.80
  6. Step 6: Final answer
    x = 508,620.75

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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.