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Finding the Fourth Proportional to 199,315.20, 298,972.80 and 188,428.80

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Solution

The fourth proportional to 199,315.20, 298,972.80 and 188,428.80 is: 282,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,315.20 : 298,972.80 = 188,428.80 : x
  2. Step 2: Convert to fraction form
    199,315.20/298,972.80 = 188,428.80/x
  3. Step 3: Cross multiply
    199,315.20x = 298,972.80 × 188,428.80
  4. Step 4: Simplify right side
    199,315.20x = 56,335,085,936.64
  5. Step 5: Solve for x
    x = 56,335,085,936.64/199,315.20
  6. Step 6: Final answer
    x = 282,643.20

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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.