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Finding the Fourth Proportional to 894.87, 1,336.55 and 771.86

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Solution

The fourth proportional to 894.87, 1,336.55 and 771.86 is: 1,152.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.87 : 1,336.55 = 771.86 : x
  2. Step 2: Convert to fraction form
    894.87/1,336.55 = 771.86/x
  3. Step 3: Cross multiply
    894.87x = 1,336.55 × 771.86
  4. Step 4: Simplify right side
    894.87x = 1,031,618.94
  5. Step 5: Solve for x
    x = 1,031,618.94/894.87
  6. Step 6: Final answer
    x = 1,152.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.