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Finding the Fourth Proportional to 331,313.90, 496,970.85 and 278,825.90

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Solution

The fourth proportional to 331,313.90, 496,970.85 and 278,825.90 is: 418,238.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,313.90 : 496,970.85 = 278,825.90 : x
  2. Step 2: Convert to fraction form
    331,313.90/496,970.85 = 278,825.90/x
  3. Step 3: Cross multiply
    331,313.90x = 496,970.85 × 278,825.90
  4. Step 4: Simplify right side
    331,313.90x = 138,568,344,525.02
  5. Step 5: Solve for x
    x = 138,568,344,525.02/331,313.90
  6. Step 6: Final answer
    x = 418,238.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.