Home / 853,489.86-1,280,425.49-321,015.51

Finding the Fourth Proportional to 853,489.86, 1,280,425.49 and 321,015.51

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Solution

The fourth proportional to 853,489.86, 1,280,425.49 and 321,015.51 is: 481,594.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,489.86 : 1,280,425.49 = 321,015.51 : x
  2. Step 2: Convert to fraction form
    853,489.86/1,280,425.49 = 321,015.51/x
  3. Step 3: Cross multiply
    853,489.86x = 1,280,425.49 × 321,015.51
  4. Step 4: Simplify right side
    853,489.86x = 411,036,440,084.27
  5. Step 5: Solve for x
    x = 411,036,440,084.27/853,489.86
  6. Step 6: Final answer
    x = 481,594.99

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Double scale
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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.