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Finding the Fourth Proportional to 383,120.55, 528,699.87 and 211,054.59

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Solution

The fourth proportional to 383,120.55, 528,699.87 and 211,054.59 is: 291,251.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,120.55 : 528,699.87 = 211,054.59 : x
  2. Step 2: Convert to fraction form
    383,120.55/528,699.87 = 211,054.59/x
  3. Step 3: Cross multiply
    383,120.55x = 528,699.87 × 211,054.59
  4. Step 4: Simplify right side
    383,120.55x = 111,584,534,295.90
  5. Step 5: Solve for x
    x = 111,584,534,295.90/383,120.55
  6. Step 6: Final answer
    x = 291,251.76

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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.