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Finding the Fourth Proportional to 945.70, 1,418.18 and 512.62

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Solution

The fourth proportional to 945.70, 1,418.18 and 512.62 is: 768.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.70 : 1,418.18 = 512.62 : x
  2. Step 2: Convert to fraction form
    945.70/1,418.18 = 512.62/x
  3. Step 3: Cross multiply
    945.70x = 1,418.18 × 512.62
  4. Step 4: Simplify right side
    945.70x = 726,987.43
  5. Step 5: Solve for x
    x = 726,987.43/945.70
  6. Step 6: Final answer
    x = 768.73

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Double scale
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1.5x scale

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.