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Finding the Fourth Proportional to 666,107.69, 998,412.48 and 328,433.67

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Solution

The fourth proportional to 666,107.69, 998,412.48 and 328,433.67 is: 492,281.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,107.69 : 998,412.48 = 328,433.67 : x
  2. Step 2: Convert to fraction form
    666,107.69/998,412.48 = 328,433.67/x
  3. Step 3: Cross multiply
    666,107.69x = 998,412.48 × 328,433.67
  4. Step 4: Simplify right side
    666,107.69x = 327,912,274,980.20
  5. Step 5: Solve for x
    x = 327,912,274,980.20/666,107.69
  6. Step 6: Final answer
    x = 492,281.18

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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.