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Finding the Fourth Proportional to 423.69, 636.45 and 358.82

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Solution

The fourth proportional to 423.69, 636.45 and 358.82 is: 539.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.69 : 636.45 = 358.82 : x
  2. Step 2: Convert to fraction form
    423.69/636.45 = 358.82/x
  3. Step 3: Cross multiply
    423.69x = 636.45 × 358.82
  4. Step 4: Simplify right side
    423.69x = 228,372.58
  5. Step 5: Solve for x
    x = 228,372.58/423.69
  6. Step 6: Final answer
    x = 539.01

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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.