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Finding the Fourth Proportional to 389.00, 536.58 and 249.06

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Solution

The fourth proportional to 389.00, 536.58 and 249.06 is: 343.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.00 : 536.58 = 249.06 : x
  2. Step 2: Convert to fraction form
    389.00/536.58 = 249.06/x
  3. Step 3: Cross multiply
    389.00x = 536.58 × 249.06
  4. Step 4: Simplify right side
    389.00x = 133,639.37
  5. Step 5: Solve for x
    x = 133,639.37/389.00
  6. Step 6: Final answer
    x = 343.55

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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.