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Finding the Fourth Proportional to 664,872.50, 917,590.45 and 396,600.50

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Solution

The fourth proportional to 664,872.50, 917,590.45 and 396,600.50 is: 547,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,872.50 : 917,590.45 = 396,600.50 : x
  2. Step 2: Convert to fraction form
    664,872.50/917,590.45 = 396,600.50/x
  3. Step 3: Cross multiply
    664,872.50x = 917,590.45 × 396,600.50
  4. Step 4: Simplify right side
    664,872.50x = 363,916,831,265.23
  5. Step 5: Solve for x
    x = 363,916,831,265.23/664,872.50
  6. Step 6: Final answer
    x = 547,348.30

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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.