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Finding the Fourth Proportional to 383,115.72, 528,678.98 and 211,027.98

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Solution

The fourth proportional to 383,115.72, 528,678.98 and 211,027.98 is: 291,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,115.72 : 528,678.98 = 211,027.98 : x
  2. Step 2: Convert to fraction form
    383,115.72/528,678.98 = 211,027.98/x
  3. Step 3: Cross multiply
    383,115.72x = 528,678.98 × 211,027.98
  4. Step 4: Simplify right side
    383,115.72x = 111,566,057,217.86
  5. Step 5: Solve for x
    x = 111,566,057,217.86/383,115.72
  6. Step 6: Final answer
    x = 291,207.20

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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.