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Finding the Fourth Proportional to 773.42, 1,065.39 and 625.64

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Solution

The fourth proportional to 773.42, 1,065.39 and 625.64 is: 861.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.42 : 1,065.39 = 625.64 : x
  2. Step 2: Convert to fraction form
    773.42/1,065.39 = 625.64/x
  3. Step 3: Cross multiply
    773.42x = 1,065.39 × 625.64
  4. Step 4: Simplify right side
    773.42x = 666,550.60
  5. Step 5: Solve for x
    x = 666,550.60/773.42
  6. Step 6: Final answer
    x = 861.82

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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.