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Finding the Fourth Proportional to 438,611.13, 657,940.19 and 139,114.44

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Solution

The fourth proportional to 438,611.13, 657,940.19 and 139,114.44 is: 208,679.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,611.13 : 657,940.19 = 139,114.44 : x
  2. Step 2: Convert to fraction form
    438,611.13/657,940.19 = 139,114.44/x
  3. Step 3: Cross multiply
    438,611.13x = 657,940.19 × 139,114.44
  4. Step 4: Simplify right side
    438,611.13x = 91,528,980,389.77
  5. Step 5: Solve for x
    x = 91,528,980,389.77/438,611.13
  6. Step 6: Final answer
    x = 208,679.11

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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.