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Finding the Fourth Proportional to 303,485.55, 455,720.40 and 219,832.80

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Solution

The fourth proportional to 303,485.55, 455,720.40 and 219,832.80 is: 330,105.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,485.55 : 455,720.40 = 219,832.80 : x
  2. Step 2: Convert to fraction form
    303,485.55/455,720.40 = 219,832.80/x
  3. Step 3: Cross multiply
    303,485.55x = 455,720.40 × 219,832.80
  4. Step 4: Simplify right side
    303,485.55x = 100,182,291,549.12
  5. Step 5: Solve for x
    x = 100,182,291,549.12/303,485.55
  6. Step 6: Final answer
    x = 330,105.64

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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.