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Finding the Fourth Proportional to 668,625.49, 922,703.11 and 378,230.85

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Solution

The fourth proportional to 668,625.49, 922,703.11 and 378,230.85 is: 521,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,625.49 : 922,703.11 = 378,230.85 : x
  2. Step 2: Convert to fraction form
    668,625.49/922,703.11 = 378,230.85/x
  3. Step 3: Cross multiply
    668,625.49x = 922,703.11 × 378,230.85
  4. Step 4: Simplify right side
    668,625.49x = 348,994,781,592.94
  5. Step 5: Solve for x
    x = 348,994,781,592.94/668,625.49
  6. Step 6: Final answer
    x = 521,958.54

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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.