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Finding the Fourth Proportional to 389.23, 537.29 and 258.41

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Solution

The fourth proportional to 389.23, 537.29 and 258.41 is: 356.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.23 : 537.29 = 258.41 : x
  2. Step 2: Convert to fraction form
    389.23/537.29 = 258.41/x
  3. Step 3: Cross multiply
    389.23x = 537.29 × 258.41
  4. Step 4: Simplify right side
    389.23x = 138,841.11
  5. Step 5: Solve for x
    x = 138,841.11/389.23
  6. Step 6: Final answer
    x = 356.71

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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.