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Finding the Fourth Proportional to 331,650.80, 496,417.80 and 261,666.80

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Solution

The fourth proportional to 331,650.80, 496,417.80 and 261,666.80 is: 391,665.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,650.80 : 496,417.80 = 261,666.80 : x
  2. Step 2: Convert to fraction form
    331,650.80/496,417.80 = 261,666.80/x
  3. Step 3: Cross multiply
    331,650.80x = 496,417.80 × 261,666.80
  4. Step 4: Simplify right side
    331,650.80x = 129,896,057,189.04
  5. Step 5: Solve for x
    x = 129,896,057,189.04/331,650.80
  6. Step 6: Final answer
    x = 391,665.14

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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.