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Finding the Fourth Proportional to 198,728.90, 298,093.35 and 65,629.70

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Solution

The fourth proportional to 198,728.90, 298,093.35 and 65,629.70 is: 98,444.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,728.90 : 298,093.35 = 65,629.70 : x
  2. Step 2: Convert to fraction form
    198,728.90/298,093.35 = 65,629.70/x
  3. Step 3: Cross multiply
    198,728.90x = 298,093.35 × 65,629.70
  4. Step 4: Simplify right side
    198,728.90x = 19,563,777,132.50
  5. Step 5: Solve for x
    x = 19,563,777,132.50/198,728.90
  6. Step 6: Final answer
    x = 98,444.55

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1.5x scale

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.