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Finding the Fourth Proportional to 666,116.46, 919,217.97 and 379,728.81

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Solution

The fourth proportional to 666,116.46, 919,217.97 and 379,728.81 is: 524,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,116.46 : 919,217.97 = 379,728.81 : x
  2. Step 2: Convert to fraction form
    666,116.46/919,217.97 = 379,728.81/x
  3. Step 3: Cross multiply
    666,116.46x = 919,217.97 × 379,728.81
  4. Step 4: Simplify right side
    666,116.46x = 349,053,545,878.72
  5. Step 5: Solve for x
    x = 349,053,545,878.72/666,116.46
  6. Step 6: Final answer
    x = 524,012.79

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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.