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Finding the Fourth Proportional to 401.02, 552.56 and 356.88

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Solution

The fourth proportional to 401.02, 552.56 and 356.88 is: 491.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.02 : 552.56 = 356.88 : x
  2. Step 2: Convert to fraction form
    401.02/552.56 = 356.88/x
  3. Step 3: Cross multiply
    401.02x = 552.56 × 356.88
  4. Step 4: Simplify right side
    401.02x = 197,197.61
  5. Step 5: Solve for x
    x = 197,197.61/401.02
  6. Step 6: Final answer
    x = 491.74

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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.