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Finding the Fourth Proportional to 427,798.80, 641,684.60 and 203,320.72

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Solution

The fourth proportional to 427,798.80, 641,684.60 and 203,320.72 is: 304,974.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,798.80 : 641,684.60 = 203,320.72 : x
  2. Step 2: Convert to fraction form
    427,798.80/641,684.60 = 203,320.72/x
  3. Step 3: Cross multiply
    427,798.80x = 641,684.60 × 203,320.72
  4. Step 4: Simplify right side
    427,798.80x = 130,467,774,884.91
  5. Step 5: Solve for x
    x = 130,467,774,884.91/427,798.80
  6. Step 6: Final answer
    x = 304,974.62

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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.