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Finding the Fourth Proportional to 844.08, 1,264.80 and 764.16

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Solution

The fourth proportional to 844.08, 1,264.80 and 764.16 is: 1,145.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.08 : 1,264.80 = 764.16 : x
  2. Step 2: Convert to fraction form
    844.08/1,264.80 = 764.16/x
  3. Step 3: Cross multiply
    844.08x = 1,264.80 × 764.16
  4. Step 4: Simplify right side
    844.08x = 966,509.57
  5. Step 5: Solve for x
    x = 966,509.57/844.08
  6. Step 6: Final answer
    x = 1,145.04

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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.