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Finding the Fourth Proportional to 303,591.80, 455,387.70 and 145,782.20

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Solution

The fourth proportional to 303,591.80, 455,387.70 and 145,782.20 is: 218,673.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,591.80 : 455,387.70 = 145,782.20 : x
  2. Step 2: Convert to fraction form
    303,591.80/455,387.70 = 145,782.20/x
  3. Step 3: Cross multiply
    303,591.80x = 455,387.70 × 145,782.20
  4. Step 4: Simplify right side
    303,591.80x = 66,387,420,758.94
  5. Step 5: Solve for x
    x = 66,387,420,758.94/303,591.80
  6. Step 6: Final answer
    x = 218,673.30

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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.