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Finding the Fourth Proportional to 949.25, 1,423.85 and 624.85

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Solution

The fourth proportional to 949.25, 1,423.85 and 624.85 is: 937.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.25 : 1,423.85 = 624.85 : x
  2. Step 2: Convert to fraction form
    949.25/1,423.85 = 624.85/x
  3. Step 3: Cross multiply
    949.25x = 1,423.85 × 624.85
  4. Step 4: Simplify right side
    949.25x = 889,685.99
  5. Step 5: Solve for x
    x = 889,685.99/949.25
  6. Step 6: Final answer
    x = 937.25

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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.