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Finding the Fourth Proportional to 389.05, 536.87 and 358.09

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Solution

The fourth proportional to 389.05, 536.87 and 358.09 is: 494.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.05 : 536.87 = 358.09 : x
  2. Step 2: Convert to fraction form
    389.05/536.87 = 358.09/x
  3. Step 3: Cross multiply
    389.05x = 536.87 × 358.09
  4. Step 4: Simplify right side
    389.05x = 192,245.99
  5. Step 5: Solve for x
    x = 192,245.99/389.05
  6. Step 6: Final answer
    x = 494.14

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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.