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Finding the Fourth Proportional to 730.96, 1,006.60 and 625.64

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Solution

The fourth proportional to 730.96, 1,006.60 and 625.64 is: 861.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.96 : 1,006.60 = 625.64 : x
  2. Step 2: Convert to fraction form
    730.96/1,006.60 = 625.64/x
  3. Step 3: Cross multiply
    730.96x = 1,006.60 × 625.64
  4. Step 4: Simplify right side
    730.96x = 629,769.22
  5. Step 5: Solve for x
    x = 629,769.22/730.96
  6. Step 6: Final answer
    x = 861.56

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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.