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Finding the Fourth Proportional to 303,771.20, 455,656.80 and 215,124.80

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Solution

The fourth proportional to 303,771.20, 455,656.80 and 215,124.80 is: 322,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,771.20 : 455,656.80 = 215,124.80 : x
  2. Step 2: Convert to fraction form
    303,771.20/455,656.80 = 215,124.80/x
  3. Step 3: Cross multiply
    303,771.20x = 455,656.80 × 215,124.80
  4. Step 4: Simplify right side
    303,771.20x = 98,023,077,968.64
  5. Step 5: Solve for x
    x = 98,023,077,968.64/303,771.20
  6. Step 6: Final answer
    x = 322,687.20

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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.