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Finding the Fourth Proportional to 293,221.40, 439,832.10 and 261,728.60

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Solution

The fourth proportional to 293,221.40, 439,832.10 and 261,728.60 is: 392,592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,221.40 : 439,832.10 = 261,728.60 : x
  2. Step 2: Convert to fraction form
    293,221.40/439,832.10 = 261,728.60/x
  3. Step 3: Cross multiply
    293,221.40x = 439,832.10 × 261,728.60
  4. Step 4: Simplify right side
    293,221.40x = 115,116,639,768.06
  5. Step 5: Solve for x
    x = 115,116,639,768.06/293,221.40
  6. Step 6: Final answer
    x = 392,592.90

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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.