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Finding the Fourth Proportional to 454.81, 680.58 and 394.15

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Solution

The fourth proportional to 454.81, 680.58 and 394.15 is: 589.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.81 : 680.58 = 394.15 : x
  2. Step 2: Convert to fraction form
    454.81/680.58 = 394.15/x
  3. Step 3: Cross multiply
    454.81x = 680.58 × 394.15
  4. Step 4: Simplify right side
    454.81x = 268,250.61
  5. Step 5: Solve for x
    x = 268,250.61/454.81
  6. Step 6: Final answer
    x = 589.81

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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.