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Finding the Fourth Proportional to 405.75, 608.64 and 162.30

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Solution

The fourth proportional to 405.75, 608.64 and 162.30 is: 243.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.75 : 608.64 = 162.30 : x
  2. Step 2: Convert to fraction form
    405.75/608.64 = 162.30/x
  3. Step 3: Cross multiply
    405.75x = 608.64 × 162.30
  4. Step 4: Simplify right side
    405.75x = 98,782.27
  5. Step 5: Solve for x
    x = 98,782.27/405.75
  6. Step 6: Final answer
    x = 243.46

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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.