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Finding the Fourth Proportional to 403.04, 552.86 and 399.58

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Solution

The fourth proportional to 403.04, 552.86 and 399.58 is: 548.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.04 : 552.86 = 399.58 : x
  2. Step 2: Convert to fraction form
    403.04/552.86 = 399.58/x
  3. Step 3: Cross multiply
    403.04x = 552.86 × 399.58
  4. Step 4: Simplify right side
    403.04x = 220,911.80
  5. Step 5: Solve for x
    x = 220,911.80/403.04
  6. Step 6: Final answer
    x = 548.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.