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Finding the Fourth Proportional to 894.64, 1,343.28 and 779.80

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Solution

The fourth proportional to 894.64, 1,343.28 and 779.80 is: 1,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.64 : 1,343.28 = 779.80 : x
  2. Step 2: Convert to fraction form
    894.64/1,343.28 = 779.80/x
  3. Step 3: Cross multiply
    894.64x = 1,343.28 × 779.80
  4. Step 4: Simplify right side
    894.64x = 1,047,489.74
  5. Step 5: Solve for x
    x = 1,047,489.74/894.64
  6. Step 6: Final answer
    x = 1,170.85

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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.