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Finding the Fourth Proportional to 395.58, 592.56 and 221.70

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Solution

The fourth proportional to 395.58, 592.56 and 221.70 is: 332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.58 : 592.56 = 221.70 : x
  2. Step 2: Convert to fraction form
    395.58/592.56 = 221.70/x
  3. Step 3: Cross multiply
    395.58x = 592.56 × 221.70
  4. Step 4: Simplify right side
    395.58x = 131,370.55
  5. Step 5: Solve for x
    x = 131,370.55/395.58
  6. Step 6: Final answer
    x = 332.10

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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.