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Finding the Fourth Proportional to 303,344.20, 455,016.30 and 208,865.80

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Solution

The fourth proportional to 303,344.20, 455,016.30 and 208,865.80 is: 313,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,344.20 : 455,016.30 = 208,865.80 : x
  2. Step 2: Convert to fraction form
    303,344.20/455,016.30 = 208,865.80/x
  3. Step 3: Cross multiply
    303,344.20x = 455,016.30 × 208,865.80
  4. Step 4: Simplify right side
    303,344.20x = 95,037,343,512.54
  5. Step 5: Solve for x
    x = 95,037,343,512.54/303,344.20
  6. Step 6: Final answer
    x = 313,298.70

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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.