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Finding the Fourth Proportional to 357.31, 536.06 and 100.81

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Solution

The fourth proportional to 357.31, 536.06 and 100.81 is: 151.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.31 : 536.06 = 100.81 : x
  2. Step 2: Convert to fraction form
    357.31/536.06 = 100.81/x
  3. Step 3: Cross multiply
    357.31x = 536.06 × 100.81
  4. Step 4: Simplify right side
    357.31x = 54,040.21
  5. Step 5: Solve for x
    x = 54,040.21/357.31
  6. Step 6: Final answer
    x = 151.24

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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.