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Finding the Fourth Proportional to 674.77, 930.95 and 442.03

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Solution

The fourth proportional to 674.77, 930.95 and 442.03 is: 609.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.77 : 930.95 = 442.03 : x
  2. Step 2: Convert to fraction form
    674.77/930.95 = 442.03/x
  3. Step 3: Cross multiply
    674.77x = 930.95 × 442.03
  4. Step 4: Simplify right side
    674.77x = 411,505.62
  5. Step 5: Solve for x
    x = 411,505.62/674.77
  6. Step 6: Final answer
    x = 609.85

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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.