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Finding the Fourth Proportional to 654.21, 979.97 and 624.15

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Solution

The fourth proportional to 654.21, 979.97 and 624.15 is: 934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.21 : 979.97 = 624.15 : x
  2. Step 2: Convert to fraction form
    654.21/979.97 = 624.15/x
  3. Step 3: Cross multiply
    654.21x = 979.97 × 624.15
  4. Step 4: Simplify right side
    654.21x = 611,645.15
  5. Step 5: Solve for x
    x = 611,645.15/654.21
  6. Step 6: Final answer
    x = 934.94

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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.