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Finding the Fourth Proportional to 215,808.40, 323,615.40 and 82,644.40

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Solution

The fourth proportional to 215,808.40, 323,615.40 and 82,644.40 is: 123,929.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,808.40 : 323,615.40 = 82,644.40 : x
  2. Step 2: Convert to fraction form
    215,808.40/323,615.40 = 82,644.40/x
  3. Step 3: Cross multiply
    215,808.40x = 323,615.40 × 82,644.40
  4. Step 4: Simplify right side
    215,808.40x = 26,745,000,563.76
  5. Step 5: Solve for x
    x = 26,745,000,563.76/215,808.40
  6. Step 6: Final answer
    x = 123,929.38

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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.