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Finding the Fourth Proportional to 308,670.31, 425,778.54 and 203,894.90

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Solution

The fourth proportional to 308,670.31, 425,778.54 and 203,894.90 is: 281,251.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,670.31 : 425,778.54 = 203,894.90 : x
  2. Step 2: Convert to fraction form
    308,670.31/425,778.54 = 203,894.90/x
  3. Step 3: Cross multiply
    308,670.31x = 425,778.54 × 203,894.90
  4. Step 4: Simplify right side
    308,670.31x = 86,814,072,835.45
  5. Step 5: Solve for x
    x = 86,814,072,835.45/308,670.31
  6. Step 6: Final answer
    x = 281,251.78

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1.5x scale

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.