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Finding the Fourth Proportional to 405.55, 608.32 and 324.01

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Solution

The fourth proportional to 405.55, 608.32 and 324.01 is: 486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.55 : 608.32 = 324.01 : x
  2. Step 2: Convert to fraction form
    405.55/608.32 = 324.01/x
  3. Step 3: Cross multiply
    405.55x = 608.32 × 324.01
  4. Step 4: Simplify right side
    405.55x = 197,098.72
  5. Step 5: Solve for x
    x = 197,098.72/405.55
  6. Step 6: Final answer
    x = 486.01

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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.