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Finding the Fourth Proportional to 397.68, 596.40 and 154.14

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Solution

The fourth proportional to 397.68, 596.40 and 154.14 is: 231.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.68 : 596.40 = 154.14 : x
  2. Step 2: Convert to fraction form
    397.68/596.40 = 154.14/x
  3. Step 3: Cross multiply
    397.68x = 596.40 × 154.14
  4. Step 4: Simplify right side
    397.68x = 91,929.10
  5. Step 5: Solve for x
    x = 91,929.10/397.68
  6. Step 6: Final answer
    x = 231.16

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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.