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Finding the Fourth Proportional to 427,187.43, 640,878.48 and 227,402.55

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Solution

The fourth proportional to 427,187.43, 640,878.48 and 227,402.55 is: 341,155.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,187.43 : 640,878.48 = 227,402.55 : x
  2. Step 2: Convert to fraction form
    427,187.43/640,878.48 = 227,402.55/x
  3. Step 3: Cross multiply
    427,187.43x = 640,878.48 × 227,402.55
  4. Step 4: Simplify right side
    427,187.43x = 145,737,400,592.12
  5. Step 5: Solve for x
    x = 145,737,400,592.12/427,187.43
  6. Step 6: Final answer
    x = 341,155.64

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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.