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Finding the Fourth Proportional to 621,841.80, 932,301.90 and 421,662.60

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Solution

The fourth proportional to 621,841.80, 932,301.90 and 421,662.60 is: 632,181.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,841.80 : 932,301.90 = 421,662.60 : x
  2. Step 2: Convert to fraction form
    621,841.80/932,301.90 = 421,662.60/x
  3. Step 3: Cross multiply
    621,841.80x = 932,301.90 × 421,662.60
  4. Step 4: Simplify right side
    621,841.80x = 393,116,843,138.94
  5. Step 5: Solve for x
    x = 393,116,843,138.94/621,841.80
  6. Step 6: Final answer
    x = 632,181.44

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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.