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Finding the Fourth Proportional to 879.65, 1,213.73 and 506.62

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Solution

The fourth proportional to 879.65, 1,213.73 and 506.62 is: 699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.65 : 1,213.73 = 506.62 : x
  2. Step 2: Convert to fraction form
    879.65/1,213.73 = 506.62/x
  3. Step 3: Cross multiply
    879.65x = 1,213.73 × 506.62
  4. Step 4: Simplify right side
    879.65x = 614,893.82
  5. Step 5: Solve for x
    x = 614,893.82/879.65
  6. Step 6: Final answer
    x = 699.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.