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Finding the Fourth Proportional to 879.50, 1,318.83 and 263.00

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Solution

The fourth proportional to 879.50, 1,318.83 and 263.00 is: 394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.50 : 1,318.83 = 263.00 : x
  2. Step 2: Convert to fraction form
    879.50/1,318.83 = 263.00/x
  3. Step 3: Cross multiply
    879.50x = 1,318.83 × 263.00
  4. Step 4: Simplify right side
    879.50x = 346,845.70
  5. Step 5: Solve for x
    x = 346,845.70/879.50
  6. Step 6: Final answer
    x = 394.37

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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.