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Finding the Fourth Proportional to 863.70, 1,293.93 and 574.53

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Solution

The fourth proportional to 863.70, 1,293.93 and 574.53 is: 860.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.70 : 1,293.93 = 574.53 : x
  2. Step 2: Convert to fraction form
    863.70/1,293.93 = 574.53/x
  3. Step 3: Cross multiply
    863.70x = 1,293.93 × 574.53
  4. Step 4: Simplify right side
    863.70x = 743,401.60
  5. Step 5: Solve for x
    x = 743,401.60/863.70
  6. Step 6: Final answer
    x = 860.72

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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.