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Finding the Fourth Proportional to 605,143.85, 907,405.94 and 338,832.86

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Solution

The fourth proportional to 605,143.85, 907,405.94 and 338,832.86 is: 508,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,143.85 : 907,405.94 = 338,832.86 : x
  2. Step 2: Convert to fraction form
    605,143.85/907,405.94 = 338,832.86/x
  3. Step 3: Cross multiply
    605,143.85x = 907,405.94 × 338,832.86
  4. Step 4: Simplify right side
    605,143.85x = 307,458,946,141.24
  5. Step 5: Solve for x
    x = 307,458,946,141.24/605,143.85
  6. Step 6: Final answer
    x = 508,075.80

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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.