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Finding the Fourth Proportional to 198,978.40, 298,489.52 and 65,810.16

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Solution

The fourth proportional to 198,978.40, 298,489.52 and 65,810.16 is: 98,722.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,978.40 : 298,489.52 = 65,810.16 : x
  2. Step 2: Convert to fraction form
    198,978.40/298,489.52 = 65,810.16/x
  3. Step 3: Cross multiply
    198,978.40x = 298,489.52 × 65,810.16
  4. Step 4: Simplify right side
    198,978.40x = 19,643,643,069.52
  5. Step 5: Solve for x
    x = 19,643,643,069.52/198,978.40
  6. Step 6: Final answer
    x = 98,722.49

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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.