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Finding the Fourth Proportional to 405.34, 608.08 and 161.86

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Solution

The fourth proportional to 405.34, 608.08 and 161.86 is: 242.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.34 : 608.08 = 161.86 : x
  2. Step 2: Convert to fraction form
    405.34/608.08 = 161.86/x
  3. Step 3: Cross multiply
    405.34x = 608.08 × 161.86
  4. Step 4: Simplify right side
    405.34x = 98,423.83
  5. Step 5: Solve for x
    x = 98,423.83/405.34
  6. Step 6: Final answer
    x = 242.82

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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.