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Finding the Fourth Proportional to 860.62, 1,188.44 and 625.92

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Solution

The fourth proportional to 860.62, 1,188.44 and 625.92 is: 864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.62 : 1,188.44 = 625.92 : x
  2. Step 2: Convert to fraction form
    860.62/1,188.44 = 625.92/x
  3. Step 3: Cross multiply
    860.62x = 1,188.44 × 625.92
  4. Step 4: Simplify right side
    860.62x = 743,859.29
  5. Step 5: Solve for x
    x = 743,859.29/860.62
  6. Step 6: Final answer
    x = 864.33

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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.