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Finding the Fourth Proportional to 894.96, 1,235.28 and 720

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Solution

The fourth proportional to 894.96, 1,235.28 and 720 is: 993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.96 : 1,235.28 = 720 : x
  2. Step 2: Convert to fraction form
    894.96/1,235.28 = 720/x
  3. Step 3: Cross multiply
    894.96x = 1,235.28 × 720
  4. Step 4: Simplify right side
    894.96x = 889,401.60
  5. Step 5: Solve for x
    x = 889,401.60/894.96
  6. Step 6: Final answer
    x = 993.79

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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.