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Finding the Fourth Proportional to 383,355.64, 529,034.45 and 211,279.85

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Solution

The fourth proportional to 383,355.64, 529,034.45 and 211,279.85 is: 291,568.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,355.64 : 529,034.45 = 211,279.85 : x
  2. Step 2: Convert to fraction form
    383,355.64/529,034.45 = 211,279.85/x
  3. Step 3: Cross multiply
    383,355.64x = 529,034.45 × 211,279.85
  4. Step 4: Simplify right side
    383,355.64x = 111,774,319,240.83
  5. Step 5: Solve for x
    x = 111,774,319,240.83/383,355.64
  6. Step 6: Final answer
    x = 291,568.21

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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.