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Finding the Fourth Proportional to 402.08, 554.82 and 225.02

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Solution

The fourth proportional to 402.08, 554.82 and 225.02 is: 310.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.08 : 554.82 = 225.02 : x
  2. Step 2: Convert to fraction form
    402.08/554.82 = 225.02/x
  3. Step 3: Cross multiply
    402.08x = 554.82 × 225.02
  4. Step 4: Simplify right side
    402.08x = 124,842.82
  5. Step 5: Solve for x
    x = 124,842.82/402.08
  6. Step 6: Final answer
    x = 310.50

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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.