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Finding the Fourth Proportional to 691.11, 954 and 442.44

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Solution

The fourth proportional to 691.11, 954 and 442.44 is: 610.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.11 : 954 = 442.44 : x
  2. Step 2: Convert to fraction form
    691.11/954 = 442.44/x
  3. Step 3: Cross multiply
    691.11x = 954 × 442.44
  4. Step 4: Simplify right side
    691.11x = 422,087.76
  5. Step 5: Solve for x
    x = 422,087.76/691.11
  6. Step 6: Final answer
    x = 610.74

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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.