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Finding the Fourth Proportional to 663,042.78, 994,858.20 and 347,424.66

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Solution

The fourth proportional to 663,042.78, 994,858.20 and 347,424.66 is: 521,291.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,042.78 : 994,858.20 = 347,424.66 : x
  2. Step 2: Convert to fraction form
    663,042.78/994,858.20 = 347,424.66/x
  3. Step 3: Cross multiply
    663,042.78x = 994,858.20 × 347,424.66
  4. Step 4: Simplify right side
    663,042.78x = 345,638,271,883.21
  5. Step 5: Solve for x
    x = 345,638,271,883.21/663,042.78
  6. Step 6: Final answer
    x = 521,291.06

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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.