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Finding the Fourth Proportional to 309,573.04, 427,287 and 188,781

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Solution

The fourth proportional to 309,573.04, 427,287 and 188,781 is: 260,564.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,573.04 : 427,287 = 188,781 : x
  2. Step 2: Convert to fraction form
    309,573.04/427,287 = 188,781/x
  3. Step 3: Cross multiply
    309,573.04x = 427,287 × 188,781
  4. Step 4: Simplify right side
    309,573.04x = 80,663,667,147
  5. Step 5: Solve for x
    x = 80,663,667,147/309,573.04
  6. Step 6: Final answer
    x = 260,564.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.