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Finding the Fourth Proportional to 469.03, 648.01 and 399.82

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Solution

The fourth proportional to 469.03, 648.01 and 399.82 is: 552.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.03 : 648.01 = 399.82 : x
  2. Step 2: Convert to fraction form
    469.03/648.01 = 399.82/x
  3. Step 3: Cross multiply
    469.03x = 648.01 × 399.82
  4. Step 4: Simplify right side
    469.03x = 259,086.24
  5. Step 5: Solve for x
    x = 259,086.24/469.03
  6. Step 6: Final answer
    x = 552.39

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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.