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Finding the Fourth Proportional to 312,269.92, 468,405.60 and 75,611.68

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Solution

The fourth proportional to 312,269.92, 468,405.60 and 75,611.68 is: 113,417.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,269.92 : 468,405.60 = 75,611.68 : x
  2. Step 2: Convert to fraction form
    312,269.92/468,405.60 = 75,611.68/x
  3. Step 3: Cross multiply
    312,269.92x = 468,405.60 × 75,611.68
  4. Step 4: Simplify right side
    312,269.92x = 35,416,934,337.41
  5. Step 5: Solve for x
    x = 35,416,934,337.41/312,269.92
  6. Step 6: Final answer
    x = 113,417.69

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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.