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Finding the Fourth Proportional to 558.42, 835.20 and 454.92

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Solution

The fourth proportional to 558.42, 835.20 and 454.92 is: 680.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.42 : 835.20 = 454.92 : x
  2. Step 2: Convert to fraction form
    558.42/835.20 = 454.92/x
  3. Step 3: Cross multiply
    558.42x = 835.20 × 454.92
  4. Step 4: Simplify right side
    558.42x = 379,949.18
  5. Step 5: Solve for x
    x = 379,949.18/558.42
  6. Step 6: Final answer
    x = 680.40

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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.