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Finding the Fourth Proportional to 864.45, 1,295.82 and 746.86

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Solution

The fourth proportional to 864.45, 1,295.82 and 746.86 is: 1,119.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.45 : 1,295.82 = 746.86 : x
  2. Step 2: Convert to fraction form
    864.45/1,295.82 = 746.86/x
  3. Step 3: Cross multiply
    864.45x = 1,295.82 × 746.86
  4. Step 4: Simplify right side
    864.45x = 967,792.89
  5. Step 5: Solve for x
    x = 967,792.89/864.45
  6. Step 6: Final answer
    x = 1,119.54

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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.