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Finding the Fourth Proportional to 403.38, 555.26 and 351.54

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Solution

The fourth proportional to 403.38, 555.26 and 351.54 is: 483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.38 : 555.26 = 351.54 : x
  2. Step 2: Convert to fraction form
    403.38/555.26 = 351.54/x
  3. Step 3: Cross multiply
    403.38x = 555.26 × 351.54
  4. Step 4: Simplify right side
    403.38x = 195,196.10
  5. Step 5: Solve for x
    x = 195,196.10/403.38
  6. Step 6: Final answer
    x = 483.90

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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.