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Finding the Fourth Proportional to 431,644.60, 646,430.10 and 412,982.20

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Solution

The fourth proportional to 431,644.60, 646,430.10 and 412,982.20 is: 618,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,644.60 : 646,430.10 = 412,982.20 : x
  2. Step 2: Convert to fraction form
    431,644.60/646,430.10 = 412,982.20/x
  3. Step 3: Cross multiply
    431,644.60x = 646,430.10 × 412,982.20
  4. Step 4: Simplify right side
    431,644.60x = 266,964,124,844.22
  5. Step 5: Solve for x
    x = 266,964,124,844.22/431,644.60
  6. Step 6: Final answer
    x = 618,481.33

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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.