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Finding the Fourth Proportional to 620.61, 854.71 and 574.44

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Solution

The fourth proportional to 620.61, 854.71 and 574.44 is: 791.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.61 : 854.71 = 574.44 : x
  2. Step 2: Convert to fraction form
    620.61/854.71 = 574.44/x
  3. Step 3: Cross multiply
    620.61x = 854.71 × 574.44
  4. Step 4: Simplify right side
    620.61x = 490,979.61
  5. Step 5: Solve for x
    x = 490,979.61/620.61
  6. Step 6: Final answer
    x = 791.12

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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.