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Finding the Fourth Proportional to 454.40, 681.90 and 223.45

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Solution

The fourth proportional to 454.40, 681.90 and 223.45 is: 335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.40 : 681.90 = 223.45 : x
  2. Step 2: Convert to fraction form
    454.40/681.90 = 223.45/x
  3. Step 3: Cross multiply
    454.40x = 681.90 × 223.45
  4. Step 4: Simplify right side
    454.40x = 152,367.15
  5. Step 5: Solve for x
    x = 152,367.15/454.40
  6. Step 6: Final answer
    x = 335.32

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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.