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Finding the Fourth Proportional to 389.55, 537.45 and 232.20

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Solution

The fourth proportional to 389.55, 537.45 and 232.20 is: 320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.55 : 537.45 = 232.20 : x
  2. Step 2: Convert to fraction form
    389.55/537.45 = 232.20/x
  3. Step 3: Cross multiply
    389.55x = 537.45 × 232.20
  4. Step 4: Simplify right side
    389.55x = 124,795.89
  5. Step 5: Solve for x
    x = 124,795.89/389.55
  6. Step 6: Final answer
    x = 320.36

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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.