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Finding the Fourth Proportional to 635,617.34, 876,433.11 and 405,872.54

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Solution

The fourth proportional to 635,617.34, 876,433.11 and 405,872.54 is: 559,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,617.34 : 876,433.11 = 405,872.54 : x
  2. Step 2: Convert to fraction form
    635,617.34/876,433.11 = 405,872.54/x
  3. Step 3: Cross multiply
    635,617.34x = 876,433.11 × 405,872.54
  4. Step 4: Simplify right side
    635,617.34x = 355,720,132,495.80
  5. Step 5: Solve for x
    x = 355,720,132,495.80/635,617.34
  6. Step 6: Final answer
    x = 559,645.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.