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Finding the Fourth Proportional to 779.01, 1,074.93 and 447.45

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Solution

The fourth proportional to 779.01, 1,074.93 and 447.45 is: 617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.01 : 1,074.93 = 447.45 : x
  2. Step 2: Convert to fraction form
    779.01/1,074.93 = 447.45/x
  3. Step 3: Cross multiply
    779.01x = 1,074.93 × 447.45
  4. Step 4: Simplify right side
    779.01x = 480,977.43
  5. Step 5: Solve for x
    x = 480,977.43/779.01
  6. Step 6: Final answer
    x = 617.42

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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.