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Finding the Fourth Proportional to 357.16, 536.32 and 221.07

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Solution

The fourth proportional to 357.16, 536.32 and 221.07 is: 331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.16 : 536.32 = 221.07 : x
  2. Step 2: Convert to fraction form
    357.16/536.32 = 221.07/x
  3. Step 3: Cross multiply
    357.16x = 536.32 × 221.07
  4. Step 4: Simplify right side
    357.16x = 118,563.71
  5. Step 5: Solve for x
    x = 118,563.71/357.16
  6. Step 6: Final answer
    x = 331.96

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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.