Home / 641,093.60-961,640.40-309,317.60

Finding the Fourth Proportional to 641,093.60, 961,640.40 and 309,317.60

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Solution

The fourth proportional to 641,093.60, 961,640.40 and 309,317.60 is: 463,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,093.60 : 961,640.40 = 309,317.60 : x
  2. Step 2: Convert to fraction form
    641,093.60/961,640.40 = 309,317.60/x
  3. Step 3: Cross multiply
    641,093.60x = 961,640.40 × 309,317.60
  4. Step 4: Simplify right side
    641,093.60x = 297,452,300,591.04
  5. Step 5: Solve for x
    x = 297,452,300,591.04/641,093.60
  6. Step 6: Final answer
    x = 463,976.40

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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.