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Finding the Fourth Proportional to 829.45, 1,243.47 and 360.57

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Solution

The fourth proportional to 829.45, 1,243.47 and 360.57 is: 540.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.45 : 1,243.47 = 360.57 : x
  2. Step 2: Convert to fraction form
    829.45/1,243.47 = 360.57/x
  3. Step 3: Cross multiply
    829.45x = 1,243.47 × 360.57
  4. Step 4: Simplify right side
    829.45x = 448,356.18
  5. Step 5: Solve for x
    x = 448,356.18/829.45
  6. Step 6: Final answer
    x = 540.55

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Double scale
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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.