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Finding the Fourth Proportional to 552,403.20, 828,021.60 and 215,313.60

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Solution

The fourth proportional to 552,403.20, 828,021.60 and 215,313.60 is: 322,743.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,403.20 : 828,021.60 = 215,313.60 : x
  2. Step 2: Convert to fraction form
    552,403.20/828,021.60 = 215,313.60/x
  3. Step 3: Cross multiply
    552,403.20x = 828,021.60 × 215,313.60
  4. Step 4: Simplify right side
    552,403.20x = 178,284,311,573.76
  5. Step 5: Solve for x
    x = 178,284,311,573.76/552,403.20
  6. Step 6: Final answer
    x = 322,743.08

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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.