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Finding the Fourth Proportional to 529,212.40, 791,874.60 and 389,244.40

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Solution

The fourth proportional to 529,212.40, 791,874.60 and 389,244.40 is: 582,436.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,212.40 : 791,874.60 = 389,244.40 : x
  2. Step 2: Convert to fraction form
    529,212.40/791,874.60 = 389,244.40/x
  3. Step 3: Cross multiply
    529,212.40x = 791,874.60 × 389,244.40
  4. Step 4: Simplify right side
    529,212.40x = 308,232,753,552.24
  5. Step 5: Solve for x
    x = 308,232,753,552.24/529,212.40
  6. Step 6: Final answer
    x = 582,436.76

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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.