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Finding the Fourth Proportional to 605,616.30, 907,987.05 and 339,458.40

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Solution

The fourth proportional to 605,616.30, 907,987.05 and 339,458.40 is: 508,942.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,616.30 : 907,987.05 = 339,458.40 : x
  2. Step 2: Convert to fraction form
    605,616.30/907,987.05 = 339,458.40/x
  3. Step 3: Cross multiply
    605,616.30x = 907,987.05 × 339,458.40
  4. Step 4: Simplify right side
    605,616.30x = 308,223,831,213.72
  5. Step 5: Solve for x
    x = 308,223,831,213.72/605,616.30
  6. Step 6: Final answer
    x = 508,942.43

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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.