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Finding the Fourth Proportional to 405.55, 608.90 and 223.08

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Solution

The fourth proportional to 405.55, 608.90 and 223.08 is: 334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.55 : 608.90 = 223.08 : x
  2. Step 2: Convert to fraction form
    405.55/608.90 = 223.08/x
  3. Step 3: Cross multiply
    405.55x = 608.90 × 223.08
  4. Step 4: Simplify right side
    405.55x = 135,829.25
  5. Step 5: Solve for x
    x = 135,829.25/405.55
  6. Step 6: Final answer
    x = 334.93

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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.