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Finding the Fourth Proportional to 879.62, 1,319.05 and 468.66

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Solution

The fourth proportional to 879.62, 1,319.05 and 468.66 is: 702.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.62 : 1,319.05 = 468.66 : x
  2. Step 2: Convert to fraction form
    879.62/1,319.05 = 468.66/x
  3. Step 3: Cross multiply
    879.62x = 1,319.05 × 468.66
  4. Step 4: Simplify right side
    879.62x = 618,183.63
  5. Step 5: Solve for x
    x = 618,183.63/879.62
  6. Step 6: Final answer
    x = 702.78

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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.