Home / 853,808.39-1,280,712.58-321,448.85

Finding the Fourth Proportional to 853,808.39, 1,280,712.58 and 321,448.85

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Solution

The fourth proportional to 853,808.39, 1,280,712.58 and 321,448.85 is: 482,173.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,808.39 : 1,280,712.58 = 321,448.85 : x
  2. Step 2: Convert to fraction form
    853,808.39/1,280,712.58 = 321,448.85/x
  3. Step 3: Cross multiply
    853,808.39x = 1,280,712.58 × 321,448.85
  4. Step 4: Simplify right side
    853,808.39x = 411,683,583,617.02
  5. Step 5: Solve for x
    x = 411,683,583,617.02/853,808.39
  6. Step 6: Final answer
    x = 482,173.27

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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.