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Finding the Fourth Proportional to 402.22, 556.23 and 340.66

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Solution

The fourth proportional to 402.22, 556.23 and 340.66 is: 471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.22 : 556.23 = 340.66 : x
  2. Step 2: Convert to fraction form
    402.22/556.23 = 340.66/x
  3. Step 3: Cross multiply
    402.22x = 556.23 × 340.66
  4. Step 4: Simplify right side
    402.22x = 189,485.31
  5. Step 5: Solve for x
    x = 189,485.31/402.22
  6. Step 6: Final answer
    x = 471.10

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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.