Home / 664,256.10-996,384.15-439,869.90

Finding the Fourth Proportional to 664,256.10, 996,384.15 and 439,869.90

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Solution

The fourth proportional to 664,256.10, 996,384.15 and 439,869.90 is: 659,804.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,256.10 : 996,384.15 = 439,869.90 : x
  2. Step 2: Convert to fraction form
    664,256.10/996,384.15 = 439,869.90/x
  3. Step 3: Cross multiply
    664,256.10x = 996,384.15 × 439,869.90
  4. Step 4: Simplify right side
    664,256.10x = 438,279,396,422.09
  5. Step 5: Solve for x
    x = 438,279,396,422.09/664,256.10
  6. Step 6: Final answer
    x = 659,804.85

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Double scale
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Similar ratio
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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.