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Finding the Fourth Proportional to 965,699.20, 1,449,067.20 and 404,790.40

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Solution

The fourth proportional to 965,699.20, 1,449,067.20 and 404,790.40 is: 607,402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    965,699.20 : 1,449,067.20 = 404,790.40 : x
  2. Step 2: Convert to fraction form
    965,699.20/1,449,067.20 = 404,790.40/x
  3. Step 3: Cross multiply
    965,699.20x = 1,449,067.20 × 404,790.40
  4. Step 4: Simplify right side
    965,699.20x = 586,568,491,514.88
  5. Step 5: Solve for x
    x = 586,568,491,514.88/965,699.20
  6. Step 6: Final answer
    x = 607,402.90

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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.