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Finding the Fourth Proportional to 402.56, 554.88 and 352.64

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Solution

The fourth proportional to 402.56, 554.88 and 352.64 is: 486.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.56 : 554.88 = 352.64 : x
  2. Step 2: Convert to fraction form
    402.56/554.88 = 352.64/x
  3. Step 3: Cross multiply
    402.56x = 554.88 × 352.64
  4. Step 4: Simplify right side
    402.56x = 195,672.88
  5. Step 5: Solve for x
    x = 195,672.88/402.56
  6. Step 6: Final answer
    x = 486.07

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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.