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Finding the Fourth Proportional to 829.02, 1,243.52 and 251.90

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Solution

The fourth proportional to 829.02, 1,243.52 and 251.90 is: 377.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.02 : 1,243.52 = 251.90 : x
  2. Step 2: Convert to fraction form
    829.02/1,243.52 = 251.90/x
  3. Step 3: Cross multiply
    829.02x = 1,243.52 × 251.90
  4. Step 4: Simplify right side
    829.02x = 313,242.69
  5. Step 5: Solve for x
    x = 313,242.69/829.02
  6. Step 6: Final answer
    x = 377.85

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Double scale
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Similar ratio
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1.5x scale

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.