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Finding the Fourth Proportional to 258,538.44, 387,701.52 and 98,672.60

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Solution

The fourth proportional to 258,538.44, 387,701.52 and 98,672.60 is: 147,968.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,538.44 : 387,701.52 = 98,672.60 : x
  2. Step 2: Convert to fraction form
    258,538.44/387,701.52 = 98,672.60/x
  3. Step 3: Cross multiply
    258,538.44x = 387,701.52 × 98,672.60
  4. Step 4: Simplify right side
    258,538.44x = 38,255,515,063.84
  5. Step 5: Solve for x
    x = 38,255,515,063.84/258,538.44
  6. Step 6: Final answer
    x = 147,968.38

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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.