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Finding the Fourth Proportional to 364.20, 546.40 and 104.21

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Solution

The fourth proportional to 364.20, 546.40 and 104.21 is: 156.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.20 : 546.40 = 104.21 : x
  2. Step 2: Convert to fraction form
    364.20/546.40 = 104.21/x
  3. Step 3: Cross multiply
    364.20x = 546.40 × 104.21
  4. Step 4: Simplify right side
    364.20x = 56,940.34
  5. Step 5: Solve for x
    x = 56,940.34/364.20
  6. Step 6: Final answer
    x = 156.34

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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.