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Finding the Fourth Proportional to 844.80, 1,266.72 and 649.32

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Solution

The fourth proportional to 844.80, 1,266.72 and 649.32 is: 973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.80 : 1,266.72 = 649.32 : x
  2. Step 2: Convert to fraction form
    844.80/1,266.72 = 649.32/x
  3. Step 3: Cross multiply
    844.80x = 1,266.72 × 649.32
  4. Step 4: Simplify right side
    844.80x = 822,506.63
  5. Step 5: Solve for x
    x = 822,506.63/844.80
  6. Step 6: Final answer
    x = 973.61

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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.