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Finding the Fourth Proportional to 356.12, 536.55 and 321.92

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Solution

The fourth proportional to 356.12, 536.55 and 321.92 is: 485.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.12 : 536.55 = 321.92 : x
  2. Step 2: Convert to fraction form
    356.12/536.55 = 321.92/x
  3. Step 3: Cross multiply
    356.12x = 536.55 × 321.92
  4. Step 4: Simplify right side
    356.12x = 172,726.18
  5. Step 5: Solve for x
    x = 172,726.18/356.12
  6. Step 6: Final answer
    x = 485.02

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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.