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Finding the Fourth Proportional to 218,679.64, 326,821.33 and 159,639.64

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Solution

The fourth proportional to 218,679.64, 326,821.33 and 159,639.64 is: 238,584.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,679.64 : 326,821.33 = 159,639.64 : x
  2. Step 2: Convert to fraction form
    218,679.64/326,821.33 = 159,639.64/x
  3. Step 3: Cross multiply
    218,679.64x = 326,821.33 × 159,639.64
  4. Step 4: Simplify right side
    218,679.64x = 52,173,639,465.52
  5. Step 5: Solve for x
    x = 52,173,639,465.52/218,679.64
  6. Step 6: Final answer
    x = 238,584.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.