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Finding the Fourth Proportional to 665,775.32, 998,914.62 and 399,721.34

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Solution

The fourth proportional to 665,775.32, 998,914.62 and 399,721.34 is: 599,733.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,775.32 : 998,914.62 = 399,721.34 : x
  2. Step 2: Convert to fraction form
    665,775.32/998,914.62 = 399,721.34/x
  3. Step 3: Cross multiply
    665,775.32x = 998,914.62 × 399,721.34
  4. Step 4: Simplify right side
    665,775.32x = 399,287,490,451.99
  5. Step 5: Solve for x
    x = 399,287,490,451.99/665,775.32
  6. Step 6: Final answer
    x = 599,733.09

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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.