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Finding the Fourth Proportional to 401.82, 603.51 and 356.56

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Solution

The fourth proportional to 401.82, 603.51 and 356.56 is: 535.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.82 : 603.51 = 356.56 : x
  2. Step 2: Convert to fraction form
    401.82/603.51 = 356.56/x
  3. Step 3: Cross multiply
    401.82x = 603.51 × 356.56
  4. Step 4: Simplify right side
    401.82x = 215,187.53
  5. Step 5: Solve for x
    x = 215,187.53/401.82
  6. Step 6: Final answer
    x = 535.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.