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Finding the Fourth Proportional to 280,955.20, 421,821.60 and 221,857.60

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Solution

The fourth proportional to 280,955.20, 421,821.60 and 221,857.60 is: 333,093.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,955.20 : 421,821.60 = 221,857.60 : x
  2. Step 2: Convert to fraction form
    280,955.20/421,821.60 = 221,857.60/x
  3. Step 3: Cross multiply
    280,955.20x = 421,821.60 × 221,857.60
  4. Step 4: Simplify right side
    280,955.20x = 93,584,327,804.16
  5. Step 5: Solve for x
    x = 93,584,327,804.16/280,955.20
  6. Step 6: Final answer
    x = 333,093.42

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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.