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Finding the Fourth Proportional to 666,849.86, 999,540.90 and 329,390.90

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Solution

The fourth proportional to 666,849.86, 999,540.90 and 329,390.90 is: 493,723.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,849.86 : 999,540.90 = 329,390.90 : x
  2. Step 2: Convert to fraction form
    666,849.86/999,540.90 = 329,390.90/x
  3. Step 3: Cross multiply
    666,849.86x = 999,540.90 × 329,390.90
  4. Step 4: Simplify right side
    666,849.86x = 329,239,676,637.81
  5. Step 5: Solve for x
    x = 329,239,676,637.81/666,849.86
  6. Step 6: Final answer
    x = 493,723.84

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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.