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Finding the Fourth Proportional to 258,749.40, 388,124.10 and 132,340.80

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Solution

The fourth proportional to 258,749.40, 388,124.10 and 132,340.80 is: 198,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,749.40 : 388,124.10 = 132,340.80 : x
  2. Step 2: Convert to fraction form
    258,749.40/388,124.10 = 132,340.80/x
  3. Step 3: Cross multiply
    258,749.40x = 388,124.10 × 132,340.80
  4. Step 4: Simplify right side
    258,749.40x = 51,364,653,893.28
  5. Step 5: Solve for x
    x = 51,364,653,893.28/258,749.40
  6. Step 6: Final answer
    x = 198,511.20

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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.