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Finding the Fourth Proportional to 629,943.80, 944,915.70 and 315,015.80

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Solution

The fourth proportional to 629,943.80, 944,915.70 and 315,015.80 is: 472,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,943.80 : 944,915.70 = 315,015.80 : x
  2. Step 2: Convert to fraction form
    629,943.80/944,915.70 = 315,015.80/x
  3. Step 3: Cross multiply
    629,943.80x = 944,915.70 × 315,015.80
  4. Step 4: Simplify right side
    629,943.80x = 297,663,375,168.06
  5. Step 5: Solve for x
    x = 297,663,375,168.06/629,943.80
  6. Step 6: Final answer
    x = 472,523.70

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Double scale
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Similar ratio
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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.