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Finding the Fourth Proportional to 383,345.06, 529,019.81 and 211,269.32

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Solution

The fourth proportional to 383,345.06, 529,019.81 and 211,269.32 is: 291,553.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,345.06 : 529,019.81 = 211,269.32 : x
  2. Step 2: Convert to fraction form
    383,345.06/529,019.81 = 211,269.32/x
  3. Step 3: Cross multiply
    383,345.06x = 529,019.81 × 211,269.32
  4. Step 4: Simplify right side
    383,345.06x = 111,765,651,823.78
  5. Step 5: Solve for x
    x = 111,765,651,823.78/383,345.06
  6. Step 6: Final answer
    x = 291,553.65

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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.