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Finding the Fourth Proportional to 383,491.89, 529,194.92 and 211,400.91

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Solution

The fourth proportional to 383,491.89, 529,194.92 and 211,400.91 is: 291,720.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,491.89 : 529,194.92 = 211,400.91 : x
  2. Step 2: Convert to fraction form
    383,491.89/529,194.92 = 211,400.91/x
  3. Step 3: Cross multiply
    383,491.89x = 529,194.92 × 211,400.91
  4. Step 4: Simplify right side
    383,491.89x = 111,872,286,598.37
  5. Step 5: Solve for x
    x = 111,872,286,598.37/383,491.89
  6. Step 6: Final answer
    x = 291,720.08

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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.