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Finding the Fourth Proportional to 522,580.64, 721,291.92 and 321,260

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Solution

The fourth proportional to 522,580.64, 721,291.92 and 321,260 is: 443,419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,580.64 : 721,291.92 = 321,260 : x
  2. Step 2: Convert to fraction form
    522,580.64/721,291.92 = 321,260/x
  3. Step 3: Cross multiply
    522,580.64x = 721,291.92 × 321,260
  4. Step 4: Simplify right side
    522,580.64x = 231,722,242,219.20
  5. Step 5: Solve for x
    x = 231,722,242,219.20/522,580.64
  6. Step 6: Final answer
    x = 443,419.11

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.