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Finding the Fourth Proportional to 395.04, 592.72 and 138.72

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Solution

The fourth proportional to 395.04, 592.72 and 138.72 is: 208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.04 : 592.72 = 138.72 : x
  2. Step 2: Convert to fraction form
    395.04/592.72 = 138.72/x
  3. Step 3: Cross multiply
    395.04x = 592.72 × 138.72
  4. Step 4: Simplify right side
    395.04x = 82,222.12
  5. Step 5: Solve for x
    x = 82,222.12/395.04
  6. Step 6: Final answer
    x = 208.14

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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.