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Finding the Fourth Proportional to 427,864.58, 641,811.75 and 203,109.22

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Solution

The fourth proportional to 427,864.58, 641,811.75 and 203,109.22 is: 304,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,864.58 : 641,811.75 = 203,109.22 : x
  2. Step 2: Convert to fraction form
    427,864.58/641,811.75 = 203,109.22/x
  3. Step 3: Cross multiply
    427,864.58x = 641,811.75 × 203,109.22
  4. Step 4: Simplify right side
    427,864.58x = 130,357,879,704.73
  5. Step 5: Solve for x
    x = 130,357,879,704.73/427,864.58
  6. Step 6: Final answer
    x = 304,670.89

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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.