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Finding the Fourth Proportional to 666,121.60, 998,836.80 and 245,180.80

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Solution

The fourth proportional to 666,121.60, 998,836.80 and 245,180.80 is: 367,643.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,121.60 : 998,836.80 = 245,180.80 : x
  2. Step 2: Convert to fraction form
    666,121.60/998,836.80 = 245,180.80/x
  3. Step 3: Cross multiply
    666,121.60x = 998,836.80 × 245,180.80
  4. Step 4: Simplify right side
    666,121.60x = 244,895,605,693.44
  5. Step 5: Solve for x
    x = 244,895,605,693.44/666,121.60
  6. Step 6: Final answer
    x = 367,643.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.