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Finding the Fourth Proportional to 499,493.79, 749,042.64 and 215,205.66

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Solution

The fourth proportional to 499,493.79, 749,042.64 and 215,205.66 is: 322,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,493.79 : 749,042.64 = 215,205.66 : x
  2. Step 2: Convert to fraction form
    499,493.79/749,042.64 = 215,205.66/x
  3. Step 3: Cross multiply
    499,493.79x = 749,042.64 × 215,205.66
  4. Step 4: Simplify right side
    499,493.79x = 161,198,215,709.34
  5. Step 5: Solve for x
    x = 161,198,215,709.34/499,493.79
  6. Step 6: Final answer
    x = 322,723.16

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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.