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Finding the Fourth Proportional to 902.57, 1,355.39 and 492.50

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Solution

The fourth proportional to 902.57, 1,355.39 and 492.50 is: 739.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.57 : 1,355.39 = 492.50 : x
  2. Step 2: Convert to fraction form
    902.57/1,355.39 = 492.50/x
  3. Step 3: Cross multiply
    902.57x = 1,355.39 × 492.50
  4. Step 4: Simplify right side
    902.57x = 667,520.34
  5. Step 5: Solve for x
    x = 667,520.34/902.57
  6. Step 6: Final answer
    x = 739.58

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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.