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Finding the Fourth Proportional to 676.61, 1,014.86 and 189.64

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Solution

The fourth proportional to 676.61, 1,014.86 and 189.64 is: 284.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.61 : 1,014.86 = 189.64 : x
  2. Step 2: Convert to fraction form
    676.61/1,014.86 = 189.64/x
  3. Step 3: Cross multiply
    676.61x = 1,014.86 × 189.64
  4. Step 4: Simplify right side
    676.61x = 192,455.99
  5. Step 5: Solve for x
    x = 192,455.99/676.61
  6. Step 6: Final answer
    x = 284.44

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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.