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Finding the Fourth Proportional to 356.08, 536.63 and 321.88

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Solution

The fourth proportional to 356.08, 536.63 and 321.88 is: 485.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.08 : 536.63 = 321.88 : x
  2. Step 2: Convert to fraction form
    356.08/536.63 = 321.88/x
  3. Step 3: Cross multiply
    356.08x = 536.63 × 321.88
  4. Step 4: Simplify right side
    356.08x = 172,730.46
  5. Step 5: Solve for x
    x = 172,730.46/356.08
  6. Step 6: Final answer
    x = 485.09

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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.