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Finding the Fourth Proportional to 447,740.20, 672,128.70 and 270,447.40

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Solution

The fourth proportional to 447,740.20, 672,128.70 and 270,447.40 is: 405,984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,740.20 : 672,128.70 = 270,447.40 : x
  2. Step 2: Convert to fraction form
    447,740.20/672,128.70 = 270,447.40/x
  3. Step 3: Cross multiply
    447,740.20x = 672,128.70 × 270,447.40
  4. Step 4: Simplify right side
    447,740.20x = 181,775,459,380.38
  5. Step 5: Solve for x
    x = 181,775,459,380.38/447,740.20
  6. Step 6: Final answer
    x = 405,984.23

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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.