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Finding the Fourth Proportional to 860.04, 1,286.61 and 745.89

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Solution

The fourth proportional to 860.04, 1,286.61 and 745.89 is: 1,115.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.04 : 1,286.61 = 745.89 : x
  2. Step 2: Convert to fraction form
    860.04/1,286.61 = 745.89/x
  3. Step 3: Cross multiply
    860.04x = 1,286.61 × 745.89
  4. Step 4: Simplify right side
    860.04x = 959,669.53
  5. Step 5: Solve for x
    x = 959,669.53/860.04
  6. Step 6: Final answer
    x = 1,115.84

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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.