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Finding the Fourth Proportional to 664,379.10, 996,568.65 and 617,139.90

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Solution

The fourth proportional to 664,379.10, 996,568.65 and 617,139.90 is: 925,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,379.10 : 996,568.65 = 617,139.90 : x
  2. Step 2: Convert to fraction form
    664,379.10/996,568.65 = 617,139.90/x
  3. Step 3: Cross multiply
    664,379.10x = 996,568.65 × 617,139.90
  4. Step 4: Simplify right side
    664,379.10x = 615,022,277,004.14
  5. Step 5: Solve for x
    x = 615,022,277,004.14/664,379.10
  6. Step 6: Final answer
    x = 925,709.85

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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.