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Finding the Fourth Proportional to 215,903.40, 323,855.10 and 206,572.20

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Solution

The fourth proportional to 215,903.40, 323,855.10 and 206,572.20 is: 309,858.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,903.40 : 323,855.10 = 206,572.20 : x
  2. Step 2: Convert to fraction form
    215,903.40/323,855.10 = 206,572.20/x
  3. Step 3: Cross multiply
    215,903.40x = 323,855.10 × 206,572.20
  4. Step 4: Simplify right side
    215,903.40x = 66,899,460,488.22
  5. Step 5: Solve for x
    x = 66,899,460,488.22/215,903.40
  6. Step 6: Final answer
    x = 309,858.30

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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.