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Finding the Fourth Proportional to 303,561.80, 455,342.70 and 145,752.20

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Solution

The fourth proportional to 303,561.80, 455,342.70 and 145,752.20 is: 218,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,561.80 : 455,342.70 = 145,752.20 : x
  2. Step 2: Convert to fraction form
    303,561.80/455,342.70 = 145,752.20/x
  3. Step 3: Cross multiply
    303,561.80x = 455,342.70 × 145,752.20
  4. Step 4: Simplify right side
    303,561.80x = 66,367,200,278.94
  5. Step 5: Solve for x
    x = 66,367,200,278.94/303,561.80
  6. Step 6: Final answer
    x = 218,628.30

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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.