Home / 856,311.56-1,284,647.69-323,820.80

Finding the Fourth Proportional to 856,311.56, 1,284,647.69 and 323,820.80

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Solution

The fourth proportional to 856,311.56, 1,284,647.69 and 323,820.80 is: 485,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,311.56 : 1,284,647.69 = 323,820.80 : x
  2. Step 2: Convert to fraction form
    856,311.56/1,284,647.69 = 323,820.80/x
  3. Step 3: Cross multiply
    856,311.56x = 1,284,647.69 × 323,820.80
  4. Step 4: Simplify right side
    856,311.56x = 415,995,636,270.71
  5. Step 5: Solve for x
    x = 415,995,636,270.71/856,311.56
  6. Step 6: Final answer
    x = 485,799.40

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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.