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Finding the Fourth Proportional to 723.91, 999.05 and 404.91

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Solution

The fourth proportional to 723.91, 999.05 and 404.91 is: 558.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.91 : 999.05 = 404.91 : x
  2. Step 2: Convert to fraction form
    723.91/999.05 = 404.91/x
  3. Step 3: Cross multiply
    723.91x = 999.05 × 404.91
  4. Step 4: Simplify right side
    723.91x = 404,525.34
  5. Step 5: Solve for x
    x = 404,525.34/723.91
  6. Step 6: Final answer
    x = 558.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.