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Finding the Fourth Proportional to 454.79, 681.99 and 146.56

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Solution

The fourth proportional to 454.79, 681.99 and 146.56 is: 219.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.79 : 681.99 = 146.56 : x
  2. Step 2: Convert to fraction form
    454.79/681.99 = 146.56/x
  3. Step 3: Cross multiply
    454.79x = 681.99 × 146.56
  4. Step 4: Simplify right side
    454.79x = 99,952.72
  5. Step 5: Solve for x
    x = 99,952.72/454.79
  6. Step 6: Final answer
    x = 219.78

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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.