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Finding the Fourth Proportional to 664,936.62, 917,647.98 and 378,549

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Solution

The fourth proportional to 664,936.62, 917,647.98 and 378,549 is: 522,417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,936.62 : 917,647.98 = 378,549 : x
  2. Step 2: Convert to fraction form
    664,936.62/917,647.98 = 378,549/x
  3. Step 3: Cross multiply
    664,936.62x = 917,647.98 × 378,549
  4. Step 4: Simplify right side
    664,936.62x = 347,374,725,181.02
  5. Step 5: Solve for x
    x = 347,374,725,181.02/664,936.62
  6. Step 6: Final answer
    x = 522,417.80

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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.