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Finding the Fourth Proportional to 218,771.40, 328,286.70 and 159,457.80

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Solution

The fourth proportional to 218,771.40, 328,286.70 and 159,457.80 is: 239,281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,771.40 : 328,286.70 = 159,457.80 : x
  2. Step 2: Convert to fraction form
    218,771.40/328,286.70 = 159,457.80/x
  3. Step 3: Cross multiply
    218,771.40x = 328,286.70 × 159,457.80
  4. Step 4: Simplify right side
    218,771.40x = 52,347,874,951.26
  5. Step 5: Solve for x
    x = 52,347,874,951.26/218,771.40
  6. Step 6: Final answer
    x = 239,281.16

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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.