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Finding the Fourth Proportional to 303,478.10, 455,217.15 and 208,999.70

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Solution

The fourth proportional to 303,478.10, 455,217.15 and 208,999.70 is: 313,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,478.10 : 455,217.15 = 208,999.70 : x
  2. Step 2: Convert to fraction form
    303,478.10/455,217.15 = 208,999.70/x
  3. Step 3: Cross multiply
    303,478.10x = 455,217.15 × 208,999.70
  4. Step 4: Simplify right side
    303,478.10x = 95,140,247,784.86
  5. Step 5: Solve for x
    x = 95,140,247,784.86/303,478.10
  6. Step 6: Final answer
    x = 313,499.55

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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.