Home / 721,146.40-1,081,719.60-321,786.40

Finding the Fourth Proportional to 721,146.40, 1,081,719.60 and 321,786.40

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Solution

The fourth proportional to 721,146.40, 1,081,719.60 and 321,786.40 is: 482,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,146.40 : 1,081,719.60 = 321,786.40 : x
  2. Step 2: Convert to fraction form
    721,146.40/1,081,719.60 = 321,786.40/x
  3. Step 3: Cross multiply
    721,146.40x = 1,081,719.60 × 321,786.40
  4. Step 4: Simplify right side
    721,146.40x = 348,082,655,893.44
  5. Step 5: Solve for x
    x = 348,082,655,893.44/721,146.40
  6. Step 6: Final answer
    x = 482,679.60

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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.