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Finding the Fourth Proportional to 389.09, 536.67 and 372.48

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Solution

The fourth proportional to 389.09, 536.67 and 372.48 is: 513.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.09 : 536.67 = 372.48 : x
  2. Step 2: Convert to fraction form
    389.09/536.67 = 372.48/x
  3. Step 3: Cross multiply
    389.09x = 536.67 × 372.48
  4. Step 4: Simplify right side
    389.09x = 199,898.84
  5. Step 5: Solve for x
    x = 199,898.84/389.09
  6. Step 6: Final answer
    x = 513.77

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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.