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Finding the Fourth Proportional to 357.69, 536.16 and 138.26

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Solution

The fourth proportional to 357.69, 536.16 and 138.26 is: 207.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.69 : 536.16 = 138.26 : x
  2. Step 2: Convert to fraction form
    357.69/536.16 = 138.26/x
  3. Step 3: Cross multiply
    357.69x = 536.16 × 138.26
  4. Step 4: Simplify right side
    357.69x = 74,129.48
  5. Step 5: Solve for x
    x = 74,129.48/357.69
  6. Step 6: Final answer
    x = 207.25

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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.