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Finding the Fourth Proportional to 438,412.88, 657,638.45 and 138,915.53

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Solution

The fourth proportional to 438,412.88, 657,638.45 and 138,915.53 is: 208,379.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,412.88 : 657,638.45 = 138,915.53 : x
  2. Step 2: Convert to fraction form
    438,412.88/657,638.45 = 138,915.53/x
  3. Step 3: Cross multiply
    438,412.88x = 657,638.45 × 138,915.53
  4. Step 4: Simplify right side
    438,412.88x = 91,356,192,834.44
  5. Step 5: Solve for x
    x = 91,356,192,834.44/438,412.88
  6. Step 6: Final answer
    x = 208,379.36

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