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Finding the Fourth Proportional to 440,998.20, 661,497.30 and 219,814.20

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Solution

The fourth proportional to 440,998.20, 661,497.30 and 219,814.20 is: 329,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,998.20 : 661,497.30 = 219,814.20 : x
  2. Step 2: Convert to fraction form
    440,998.20/661,497.30 = 219,814.20/x
  3. Step 3: Cross multiply
    440,998.20x = 661,497.30 × 219,814.20
  4. Step 4: Simplify right side
    440,998.20x = 145,406,499,801.66
  5. Step 5: Solve for x
    x = 145,406,499,801.66/440,998.20
  6. Step 6: Final answer
    x = 329,721.30

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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.