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Finding the Fourth Proportional to 391,437, 540,183.24 and 212,589

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Solution

The fourth proportional to 391,437, 540,183.24 and 212,589 is: 293,372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,437 : 540,183.24 = 212,589 : x
  2. Step 2: Convert to fraction form
    391,437/540,183.24 = 212,589/x
  3. Step 3: Cross multiply
    391,437x = 540,183.24 × 212,589
  4. Step 4: Simplify right side
    391,437x = 114,837,014,808.36
  5. Step 5: Solve for x
    x = 114,837,014,808.36/391,437
  6. Step 6: Final answer
    x = 293,372.92

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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.