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Finding the Fourth Proportional to 422,407.70, 633,611.55 and 394,414.10

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Solution

The fourth proportional to 422,407.70, 633,611.55 and 394,414.10 is: 591,621.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,407.70 : 633,611.55 = 394,414.10 : x
  2. Step 2: Convert to fraction form
    422,407.70/633,611.55 = 394,414.10/x
  3. Step 3: Cross multiply
    422,407.70x = 633,611.55 × 394,414.10
  4. Step 4: Simplify right side
    422,407.70x = 249,905,329,242.86
  5. Step 5: Solve for x
    x = 249,905,329,242.86/422,407.70
  6. Step 6: Final answer
    x = 591,621.15

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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.