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Finding the Fourth Proportional to 994.50, 1,372.50 and 580.50

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Solution

The fourth proportional to 994.50, 1,372.50 and 580.50 is: 801.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.50 : 1,372.50 = 580.50 : x
  2. Step 2: Convert to fraction form
    994.50/1,372.50 = 580.50/x
  3. Step 3: Cross multiply
    994.50x = 1,372.50 × 580.50
  4. Step 4: Simplify right side
    994.50x = 796,736.25
  5. Step 5: Solve for x
    x = 796,736.25/994.50
  6. Step 6: Final answer
    x = 801.14

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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.