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Finding the Fourth Proportional to 408,099.70, 612,149.55 and 242,211.70

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Solution

The fourth proportional to 408,099.70, 612,149.55 and 242,211.70 is: 363,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,099.70 : 612,149.55 = 242,211.70 : x
  2. Step 2: Convert to fraction form
    408,099.70/612,149.55 = 242,211.70/x
  3. Step 3: Cross multiply
    408,099.70x = 612,149.55 × 242,211.70
  4. Step 4: Simplify right side
    408,099.70x = 148,269,783,159.74
  5. Step 5: Solve for x
    x = 148,269,783,159.74/408,099.70
  6. Step 6: Final answer
    x = 363,317.55

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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.