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Finding the Fourth Proportional to 405.76, 608.64 and 162.32

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Solution

The fourth proportional to 405.76, 608.64 and 162.32 is: 243.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.76 : 608.64 = 162.32 : x
  2. Step 2: Convert to fraction form
    405.76/608.64 = 162.32/x
  3. Step 3: Cross multiply
    405.76x = 608.64 × 162.32
  4. Step 4: Simplify right side
    405.76x = 98,794.44
  5. Step 5: Solve for x
    x = 98,794.44/405.76
  6. Step 6: Final answer
    x = 243.48

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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.