Home / 821,257.34-1,231,886.04-309,018.80

Finding the Fourth Proportional to 821,257.34, 1,231,886.04 and 309,018.80

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Solution

The fourth proportional to 821,257.34, 1,231,886.04 and 309,018.80 is: 463,528.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,257.34 : 1,231,886.04 = 309,018.80 : x
  2. Step 2: Convert to fraction form
    821,257.34/1,231,886.04 = 309,018.80/x
  3. Step 3: Cross multiply
    821,257.34x = 1,231,886.04 × 309,018.80
  4. Step 4: Simplify right side
    821,257.34x = 380,675,945,817.55
  5. Step 5: Solve for x
    x = 380,675,945,817.55/821,257.34
  6. Step 6: Final answer
    x = 463,528.21

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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.