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Finding the Fourth Proportional to 668,979.84, 923,179.05 and 378,586.00

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Solution

The fourth proportional to 668,979.84, 923,179.05 and 378,586.00 is: 522,441.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,979.84 : 923,179.05 = 378,586.00 : x
  2. Step 2: Convert to fraction form
    668,979.84/923,179.05 = 378,586.00/x
  3. Step 3: Cross multiply
    668,979.84x = 923,179.05 × 378,586.00
  4. Step 4: Simplify right side
    668,979.84x = 349,502,663,912.50
  5. Step 5: Solve for x
    x = 349,502,663,912.50/668,979.84
  6. Step 6: Final answer
    x = 522,441.25

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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.