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Finding the Fourth Proportional to 303,487.80, 455,231.70 and 185,389.80

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Solution

The fourth proportional to 303,487.80, 455,231.70 and 185,389.80 is: 278,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,487.80 : 455,231.70 = 185,389.80 : x
  2. Step 2: Convert to fraction form
    303,487.80/455,231.70 = 185,389.80/x
  3. Step 3: Cross multiply
    303,487.80x = 455,231.70 × 185,389.80
  4. Step 4: Simplify right side
    303,487.80x = 84,395,313,816.66
  5. Step 5: Solve for x
    x = 84,395,313,816.66/303,487.80
  6. Step 6: Final answer
    x = 278,084.70

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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.