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Finding the Fourth Proportional to 664,753.32, 917,327.70 and 378,246.60

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Solution

The fourth proportional to 664,753.32, 917,327.70 and 378,246.60 is: 521,962.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,753.32 : 917,327.70 = 378,246.60 : x
  2. Step 2: Convert to fraction form
    664,753.32/917,327.70 = 378,246.60/x
  3. Step 3: Cross multiply
    664,753.32x = 917,327.70 × 378,246.60
  4. Step 4: Simplify right side
    664,753.32x = 346,976,083,610.82
  5. Step 5: Solve for x
    x = 346,976,083,610.82/664,753.32
  6. Step 6: Final answer
    x = 521,962.17

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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.