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Finding the Fourth Proportional to 308,898.56, 426,060.20 and 283,487

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Solution

The fourth proportional to 308,898.56, 426,060.20 and 283,487 is: 391,010.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,898.56 : 426,060.20 = 283,487 : x
  2. Step 2: Convert to fraction form
    308,898.56/426,060.20 = 283,487/x
  3. Step 3: Cross multiply
    308,898.56x = 426,060.20 × 283,487
  4. Step 4: Simplify right side
    308,898.56x = 120,782,527,917.40
  5. Step 5: Solve for x
    x = 120,782,527,917.40/308,898.56
  6. Step 6: Final answer
    x = 391,010.33

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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.