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Finding the Fourth Proportional to 445,414.90, 668,122.35 and 112,990.90

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Solution

The fourth proportional to 445,414.90, 668,122.35 and 112,990.90 is: 169,486.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,414.90 : 668,122.35 = 112,990.90 : x
  2. Step 2: Convert to fraction form
    445,414.90/668,122.35 = 112,990.90/x
  3. Step 3: Cross multiply
    445,414.90x = 668,122.35 × 112,990.90
  4. Step 4: Simplify right side
    445,414.90x = 75,491,745,636.62
  5. Step 5: Solve for x
    x = 75,491,745,636.62/445,414.90
  6. Step 6: Final answer
    x = 169,486.35

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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.