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Finding the Fourth Proportional to 879.98, 1,320.25 and 360.30

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Solution

The fourth proportional to 879.98, 1,320.25 and 360.30 is: 540.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.98 : 1,320.25 = 360.30 : x
  2. Step 2: Convert to fraction form
    879.98/1,320.25 = 360.30/x
  3. Step 3: Cross multiply
    879.98x = 1,320.25 × 360.30
  4. Step 4: Simplify right side
    879.98x = 475,683.37
  5. Step 5: Solve for x
    x = 475,683.37/879.98
  6. Step 6: Final answer
    x = 540.56

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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.