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Finding the Fourth Proportional to 449,138.60, 672,930.30 and 291,285.80

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Solution

The fourth proportional to 449,138.60, 672,930.30 and 291,285.80 is: 436,424.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,138.60 : 672,930.30 = 291,285.80 : x
  2. Step 2: Convert to fraction form
    449,138.60/672,930.30 = 291,285.80/x
  3. Step 3: Cross multiply
    449,138.60x = 672,930.30 × 291,285.80
  4. Step 4: Simplify right side
    449,138.60x = 196,015,040,779.74
  5. Step 5: Solve for x
    x = 196,015,040,779.74/449,138.60
  6. Step 6: Final answer
    x = 436,424.39

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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.