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Finding the Fourth Proportional to 331,600.80, 496,342.80 and 261,616.80

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Solution

The fourth proportional to 331,600.80, 496,342.80 and 261,616.80 is: 391,590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,600.80 : 496,342.80 = 261,616.80 : x
  2. Step 2: Convert to fraction form
    331,600.80/496,342.80 = 261,616.80/x
  3. Step 3: Cross multiply
    331,600.80x = 496,342.80 × 261,616.80
  4. Step 4: Simplify right side
    331,600.80x = 129,851,615,039.04
  5. Step 5: Solve for x
    x = 129,851,615,039.04/331,600.80
  6. Step 6: Final answer
    x = 391,590.17

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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.