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Finding the Fourth Proportional to 779.40, 1,074.96 and 484.44

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Solution

The fourth proportional to 779.40, 1,074.96 and 484.44 is: 668.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.40 : 1,074.96 = 484.44 : x
  2. Step 2: Convert to fraction form
    779.40/1,074.96 = 484.44/x
  3. Step 3: Cross multiply
    779.40x = 1,074.96 × 484.44
  4. Step 4: Simplify right side
    779.40x = 520,753.62
  5. Step 5: Solve for x
    x = 520,753.62/779.40
  6. Step 6: Final answer
    x = 668.15

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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.