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Finding the Fourth Proportional to 665,910.79, 998,555.66 and 345,976.66

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Solution

The fourth proportional to 665,910.79, 998,555.66 and 345,976.66 is: 518,803.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,910.79 : 998,555.66 = 345,976.66 : x
  2. Step 2: Convert to fraction form
    665,910.79/998,555.66 = 345,976.66/x
  3. Step 3: Cross multiply
    665,910.79x = 998,555.66 × 345,976.66
  4. Step 4: Simplify right side
    665,910.79x = 345,476,947,078.12
  5. Step 5: Solve for x
    x = 345,476,947,078.12/665,910.79
  6. Step 6: Final answer
    x = 518,803.65

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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.