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Finding the Fourth Proportional to 663,251.40, 994,293.90 and 397,117.80

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Solution

The fourth proportional to 663,251.40, 994,293.90 and 397,117.80 is: 595,327.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,251.40 : 994,293.90 = 397,117.80 : x
  2. Step 2: Convert to fraction form
    663,251.40/994,293.90 = 397,117.80/x
  3. Step 3: Cross multiply
    663,251.40x = 994,293.90 × 397,117.80
  4. Step 4: Simplify right side
    663,251.40x = 394,851,806,121.42
  5. Step 5: Solve for x
    x = 394,851,806,121.42/663,251.40
  6. Step 6: Final answer
    x = 595,327.51

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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.