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Finding the Fourth Proportional to 389.15, 536.92 and 284.39

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Solution

The fourth proportional to 389.15, 536.92 and 284.39 is: 392.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.15 : 536.92 = 284.39 : x
  2. Step 2: Convert to fraction form
    389.15/536.92 = 284.39/x
  3. Step 3: Cross multiply
    389.15x = 536.92 × 284.39
  4. Step 4: Simplify right side
    389.15x = 152,691.39
  5. Step 5: Solve for x
    x = 152,691.39/389.15
  6. Step 6: Final answer
    x = 392.37

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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.