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Finding the Fourth Proportional to 402.07, 554.87 and 225.03

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Solution

The fourth proportional to 402.07, 554.87 and 225.03 is: 310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.07 : 554.87 = 225.03 : x
  2. Step 2: Convert to fraction form
    402.07/554.87 = 225.03/x
  3. Step 3: Cross multiply
    402.07x = 554.87 × 225.03
  4. Step 4: Simplify right side
    402.07x = 124,862.40
  5. Step 5: Solve for x
    x = 124,862.40/402.07
  6. Step 6: Final answer
    x = 310.55

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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.