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Finding the Fourth Proportional to 668,630.49, 922,710 and 378,235.86

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Solution

The fourth proportional to 668,630.49, 922,710 and 378,235.86 is: 521,965.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,630.49 : 922,710 = 378,235.86 : x
  2. Step 2: Convert to fraction form
    668,630.49/922,710 = 378,235.86/x
  3. Step 3: Cross multiply
    668,630.49x = 922,710 × 378,235.86
  4. Step 4: Simplify right side
    668,630.49x = 349,002,010,380.60
  5. Step 5: Solve for x
    x = 349,002,010,380.60/668,630.49
  6. Step 6: Final answer
    x = 521,965.44

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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.