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Finding the Fourth Proportional to 666,034.40, 998,468.40 and 399,900.80

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Solution

The fourth proportional to 666,034.40, 998,468.40 and 399,900.80 is: 599,501.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,034.40 : 998,468.40 = 399,900.80 : x
  2. Step 2: Convert to fraction form
    666,034.40/998,468.40 = 399,900.80/x
  3. Step 3: Cross multiply
    666,034.40x = 998,468.40 × 399,900.80
  4. Step 4: Simplify right side
    666,034.40x = 399,288,311,934.72
  5. Step 5: Solve for x
    x = 399,288,311,934.72/666,034.40
  6. Step 6: Final answer
    x = 599,501.03

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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.