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Finding the Fourth Proportional to 303,709.20, 455,563.80 and 215,062.80

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Solution

The fourth proportional to 303,709.20, 455,563.80 and 215,062.80 is: 322,594.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,709.20 : 455,563.80 = 215,062.80 : x
  2. Step 2: Convert to fraction form
    303,709.20/455,563.80 = 215,062.80/x
  3. Step 3: Cross multiply
    303,709.20x = 455,563.80 × 215,062.80
  4. Step 4: Simplify right side
    303,709.20x = 97,974,826,406.64
  5. Step 5: Solve for x
    x = 97,974,826,406.64/303,709.20
  6. Step 6: Final answer
    x = 322,594.20

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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.