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Finding the Fourth Proportional to 358.76, 538.34 and 204.86

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Solution

The fourth proportional to 358.76, 538.34 and 204.86 is: 307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.76 : 538.34 = 204.86 : x
  2. Step 2: Convert to fraction form
    358.76/538.34 = 204.86/x
  3. Step 3: Cross multiply
    358.76x = 538.34 × 204.86
  4. Step 4: Simplify right side
    358.76x = 110,284.33
  5. Step 5: Solve for x
    x = 110,284.33/358.76
  6. Step 6: Final answer
    x = 307.40

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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.