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Finding the Fourth Proportional to 265.18, 399.58 and 220.54

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Solution

The fourth proportional to 265.18, 399.58 and 220.54 is: 332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.18 : 399.58 = 220.54 : x
  2. Step 2: Convert to fraction form
    265.18/399.58 = 220.54/x
  3. Step 3: Cross multiply
    265.18x = 399.58 × 220.54
  4. Step 4: Simplify right side
    265.18x = 88,123.37
  5. Step 5: Solve for x
    x = 88,123.37/265.18
  6. Step 6: Final answer
    x = 332.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.