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Finding the Fourth Proportional to 358.73, 538.37 and 256.11

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Solution

The fourth proportional to 358.73, 538.37 and 256.11 is: 384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.73 : 538.37 = 256.11 : x
  2. Step 2: Convert to fraction form
    358.73/538.37 = 256.11/x
  3. Step 3: Cross multiply
    358.73x = 538.37 × 256.11
  4. Step 4: Simplify right side
    358.73x = 137,881.94
  5. Step 5: Solve for x
    x = 137,881.94/358.73
  6. Step 6: Final answer
    x = 384.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.