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Finding the Fourth Proportional to 303,482.20, 455,223.30 and 209,003.80

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Solution

The fourth proportional to 303,482.20, 455,223.30 and 209,003.80 is: 313,505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,482.20 : 455,223.30 = 209,003.80 : x
  2. Step 2: Convert to fraction form
    303,482.20/455,223.30 = 209,003.80/x
  3. Step 3: Cross multiply
    303,482.20x = 455,223.30 × 209,003.80
  4. Step 4: Simplify right side
    303,482.20x = 95,143,399,548.54
  5. Step 5: Solve for x
    x = 95,143,399,548.54/303,482.20
  6. Step 6: Final answer
    x = 313,505.70

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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.