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Finding the Fourth Proportional to 280,728.40, 421,092.60 and 218,059.60

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Solution

The fourth proportional to 280,728.40, 421,092.60 and 218,059.60 is: 327,089.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,728.40 : 421,092.60 = 218,059.60 : x
  2. Step 2: Convert to fraction form
    280,728.40/421,092.60 = 218,059.60/x
  3. Step 3: Cross multiply
    280,728.40x = 421,092.60 × 218,059.60
  4. Step 4: Simplify right side
    280,728.40x = 91,823,283,918.96
  5. Step 5: Solve for x
    x = 91,823,283,918.96/280,728.40
  6. Step 6: Final answer
    x = 327,089.40

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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.