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Finding the Fourth Proportional to 331,645.30, 496,409.55 and 261,661.30

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Solution

The fourth proportional to 331,645.30, 496,409.55 and 261,661.30 is: 391,656.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,645.30 : 496,409.55 = 261,661.30 : x
  2. Step 2: Convert to fraction form
    331,645.30/496,409.55 = 261,661.30/x
  3. Step 3: Cross multiply
    331,645.30x = 496,409.55 × 261,661.30
  4. Step 4: Simplify right side
    331,645.30x = 129,891,168,185.42
  5. Step 5: Solve for x
    x = 129,891,168,185.42/331,645.30
  6. Step 6: Final answer
    x = 391,656.89

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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.