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Finding the Fourth Proportional to 198,718.40, 297,998.40 and 65,561.60

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Solution

The fourth proportional to 198,718.40, 297,998.40 and 65,561.60 is: 98,316.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,718.40 : 297,998.40 = 65,561.60 : x
  2. Step 2: Convert to fraction form
    198,718.40/297,998.40 = 65,561.60/x
  3. Step 3: Cross multiply
    198,718.40x = 297,998.40 × 65,561.60
  4. Step 4: Simplify right side
    198,718.40x = 19,537,251,901.44
  5. Step 5: Solve for x
    x = 19,537,251,901.44/198,718.40
  6. Step 6: Final answer
    x = 98,316.27

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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.