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Finding the Fourth Proportional to 666,354.35, 999,530.78 and 217,074.56

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Solution

The fourth proportional to 666,354.35, 999,530.78 and 217,074.56 is: 325,611.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,354.35 : 999,530.78 = 217,074.56 : x
  2. Step 2: Convert to fraction form
    666,354.35/999,530.78 = 217,074.56/x
  3. Step 3: Cross multiply
    666,354.35x = 999,530.78 × 217,074.56
  4. Step 4: Simplify right side
    666,354.35x = 216,972,698,191.93
  5. Step 5: Solve for x
    x = 216,972,698,191.93/666,354.35
  6. Step 6: Final answer
    x = 325,611.59

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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.