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Finding the Fourth Proportional to 602.55, 830.85 and 494.42

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Solution

The fourth proportional to 602.55, 830.85 and 494.42 is: 681.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.55 : 830.85 = 494.42 : x
  2. Step 2: Convert to fraction form
    602.55/830.85 = 494.42/x
  3. Step 3: Cross multiply
    602.55x = 830.85 × 494.42
  4. Step 4: Simplify right side
    602.55x = 410,784.70
  5. Step 5: Solve for x
    x = 410,784.70/602.55
  6. Step 6: Final answer
    x = 681.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.