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Finding the Fourth Proportional to 403.27, 604.55 and 210.31

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Solution

The fourth proportional to 403.27, 604.55 and 210.31 is: 315.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.27 : 604.55 = 210.31 : x
  2. Step 2: Convert to fraction form
    403.27/604.55 = 210.31/x
  3. Step 3: Cross multiply
    403.27x = 604.55 × 210.31
  4. Step 4: Simplify right side
    403.27x = 127,141.86
  5. Step 5: Solve for x
    x = 127,141.86/403.27
  6. Step 6: Final answer
    x = 315.28

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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.