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Finding the Fourth Proportional to 438,611.63, 657,940.94 and 139,114.94

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Solution

The fourth proportional to 438,611.63, 657,940.94 and 139,114.94 is: 208,679.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,611.63 : 657,940.94 = 139,114.94 : x
  2. Step 2: Convert to fraction form
    438,611.63/657,940.94 = 139,114.94/x
  3. Step 3: Cross multiply
    438,611.63x = 657,940.94 × 139,114.94
  4. Step 4: Simplify right side
    438,611.63x = 91,529,413,696.07
  5. Step 5: Solve for x
    x = 91,529,413,696.07/438,611.63
  6. Step 6: Final answer
    x = 208,679.86

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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.