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Finding the Fourth Proportional to 666,248.90, 919,399.13 and 379,713.64

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Solution

The fourth proportional to 666,248.90, 919,399.13 and 379,713.64 is: 523,990.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,248.90 : 919,399.13 = 379,713.64 : x
  2. Step 2: Convert to fraction form
    666,248.90/919,399.13 = 379,713.64/x
  3. Step 3: Cross multiply
    666,248.90x = 919,399.13 × 379,713.64
  4. Step 4: Simplify right side
    666,248.90x = 349,108,383,769.57
  5. Step 5: Solve for x
    x = 349,108,383,769.57/666,248.90
  6. Step 6: Final answer
    x = 523,990.93

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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.