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Finding the Fourth Proportional to 605,111.80, 907,959.30 and 427,235.80

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Solution

The fourth proportional to 605,111.80, 907,959.30 and 427,235.80 is: 641,059.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,111.80 : 907,959.30 = 427,235.80 : x
  2. Step 2: Convert to fraction form
    605,111.80/907,959.30 = 427,235.80/x
  3. Step 3: Cross multiply
    605,111.80x = 907,959.30 × 427,235.80
  4. Step 4: Simplify right side
    605,111.80x = 387,912,717,902.94
  5. Step 5: Solve for x
    x = 387,912,717,902.94/605,111.80
  6. Step 6: Final answer
    x = 641,059.58

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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.