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Finding the Fourth Proportional to 356.48, 536.82 and 311.38

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Solution

The fourth proportional to 356.48, 536.82 and 311.38 is: 468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.48 : 536.82 = 311.38 : x
  2. Step 2: Convert to fraction form
    356.48/536.82 = 311.38/x
  3. Step 3: Cross multiply
    356.48x = 536.82 × 311.38
  4. Step 4: Simplify right side
    356.48x = 167,155.01
  5. Step 5: Solve for x
    x = 167,155.01/356.48
  6. Step 6: Final answer
    x = 468.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.