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Finding the Fourth Proportional to 455,207.40, 682,811.10 and 218,428.20

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Solution

The fourth proportional to 455,207.40, 682,811.10 and 218,428.20 is: 327,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,207.40 : 682,811.10 = 218,428.20 : x
  2. Step 2: Convert to fraction form
    455,207.40/682,811.10 = 218,428.20/x
  3. Step 3: Cross multiply
    455,207.40x = 682,811.10 × 218,428.20
  4. Step 4: Simplify right side
    455,207.40x = 149,145,199,513.02
  5. Step 5: Solve for x
    x = 149,145,199,513.02/455,207.40
  6. Step 6: Final answer
    x = 327,642.30

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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.