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Finding the Fourth Proportional to 385,098.80, 531,395.44 and 212,989.41

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Solution

The fourth proportional to 385,098.80, 531,395.44 and 212,989.41 is: 293,902.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,098.80 : 531,395.44 = 212,989.41 : x
  2. Step 2: Convert to fraction form
    385,098.80/531,395.44 = 212,989.41/x
  3. Step 3: Cross multiply
    385,098.80x = 531,395.44 × 212,989.41
  4. Step 4: Simplify right side
    385,098.80x = 113,181,600,709.82
  5. Step 5: Solve for x
    x = 113,181,600,709.82/385,098.80
  6. Step 6: Final answer
    x = 293,902.77

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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.