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Finding the Fourth Proportional to 988,997.76, 1,484,105.76 and 389,856.96

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Solution

The fourth proportional to 988,997.76, 1,484,105.76 and 389,856.96 is: 585,025.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,997.76 : 1,484,105.76 = 389,856.96 : x
  2. Step 2: Convert to fraction form
    988,997.76/1,484,105.76 = 389,856.96/x
  3. Step 3: Cross multiply
    988,997.76x = 1,484,105.76 × 389,856.96
  4. Step 4: Simplify right side
    988,997.76x = 578,588,959,912.09
  5. Step 5: Solve for x
    x = 578,588,959,912.09/988,997.76
  6. Step 6: Final answer
    x = 585,025.55

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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.