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Finding the Fourth Proportional to 383,803.22, 529,635.45 and 211,728.02

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Solution

The fourth proportional to 383,803.22, 529,635.45 and 211,728.02 is: 292,177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,803.22 : 529,635.45 = 211,728.02 : x
  2. Step 2: Convert to fraction form
    383,803.22/529,635.45 = 211,728.02/x
  3. Step 3: Cross multiply
    383,803.22x = 529,635.45 × 211,728.02
  4. Step 4: Simplify right side
    383,803.22x = 112,138,665,150.31
  5. Step 5: Solve for x
    x = 112,138,665,150.31/383,803.22
  6. Step 6: Final answer
    x = 292,177.50

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Why These Related Problems?

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