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Finding the Fourth Proportional to 303,487.20, 455,230.80 and 103,789.80

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Solution

The fourth proportional to 303,487.20, 455,230.80 and 103,789.80 is: 155,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,487.20 : 455,230.80 = 103,789.80 : x
  2. Step 2: Convert to fraction form
    303,487.20/455,230.80 = 103,789.80/x
  3. Step 3: Cross multiply
    303,487.20x = 455,230.80 × 103,789.80
  4. Step 4: Simplify right side
    303,487.20x = 47,248,313,685.84
  5. Step 5: Solve for x
    x = 47,248,313,685.84/303,487.20
  6. Step 6: Final answer
    x = 155,684.70

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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.