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Finding the Fourth Proportional to 331,630.80, 496,387.80 and 261,646.80

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Solution

The fourth proportional to 331,630.80, 496,387.80 and 261,646.80 is: 391,635.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,630.80 : 496,387.80 = 261,646.80 : x
  2. Step 2: Convert to fraction form
    331,630.80/496,387.80 = 261,646.80/x
  3. Step 3: Cross multiply
    331,630.80x = 496,387.80 × 261,646.80
  4. Step 4: Simplify right side
    331,630.80x = 129,878,279,429.04
  5. Step 5: Solve for x
    x = 129,878,279,429.04/331,630.80
  6. Step 6: Final answer
    x = 391,635.15

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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.