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Finding the Fourth Proportional to 383,390.96, 529,109.90 and 211,339.50

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Solution

The fourth proportional to 383,390.96, 529,109.90 and 211,339.50 is: 291,665.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,390.96 : 529,109.90 = 211,339.50 : x
  2. Step 2: Convert to fraction form
    383,390.96/529,109.90 = 211,339.50/x
  3. Step 3: Cross multiply
    383,390.96x = 529,109.90 × 211,339.50
  4. Step 4: Simplify right side
    383,390.96x = 111,821,820,654.35
  5. Step 5: Solve for x
    x = 111,821,820,654.35/383,390.96
  6. Step 6: Final answer
    x = 291,665.25

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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.