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Finding the Fourth Proportional to 395.15, 592.47 and 121.19

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Solution

The fourth proportional to 395.15, 592.47 and 121.19 is: 181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.15 : 592.47 = 121.19 : x
  2. Step 2: Convert to fraction form
    395.15/592.47 = 121.19/x
  3. Step 3: Cross multiply
    395.15x = 592.47 × 121.19
  4. Step 4: Simplify right side
    395.15x = 71,798.48
  5. Step 5: Solve for x
    x = 71,798.48/395.15
  6. Step 6: Final answer
    x = 181.70

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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.