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Finding the Fourth Proportional to 666,168.55, 999,109.65 and 210,795.86

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Solution

The fourth proportional to 666,168.55, 999,109.65 and 210,795.86 is: 316,148.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,168.55 : 999,109.65 = 210,795.86 : x
  2. Step 2: Convert to fraction form
    666,168.55/999,109.65 = 210,795.86/x
  3. Step 3: Cross multiply
    666,168.55x = 999,109.65 × 210,795.86
  4. Step 4: Simplify right side
    666,168.55x = 210,608,177,906.05
  5. Step 5: Solve for x
    x = 210,608,177,906.05/666,168.55
  6. Step 6: Final answer
    x = 316,148.49

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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.