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Finding the Fourth Proportional to 879.83, 1,319.78 and 263.53

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Solution

The fourth proportional to 879.83, 1,319.78 and 263.53 is: 395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.83 : 1,319.78 = 263.53 : x
  2. Step 2: Convert to fraction form
    879.83/1,319.78 = 263.53/x
  3. Step 3: Cross multiply
    879.83x = 1,319.78 × 263.53
  4. Step 4: Simplify right side
    879.83x = 347,797.01
  5. Step 5: Solve for x
    x = 347,797.01/879.83
  6. Step 6: Final answer
    x = 395.30

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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.