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Finding the Fourth Proportional to 389.25, 536.85 and 264.78

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Solution

The fourth proportional to 389.25, 536.85 and 264.78 is: 365.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.25 : 536.85 = 264.78 : x
  2. Step 2: Convert to fraction form
    389.25/536.85 = 264.78/x
  3. Step 3: Cross multiply
    389.25x = 536.85 × 264.78
  4. Step 4: Simplify right side
    389.25x = 142,147.14
  5. Step 5: Solve for x
    x = 142,147.14/389.25
  6. Step 6: Final answer
    x = 365.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.