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Finding the Fourth Proportional to 300,043.60, 448,971.90 and 221,311.60

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Solution

The fourth proportional to 300,043.60, 448,971.90 and 221,311.60 is: 331,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,043.60 : 448,971.90 = 221,311.60 : x
  2. Step 2: Convert to fraction form
    300,043.60/448,971.90 = 221,311.60/x
  3. Step 3: Cross multiply
    300,043.60x = 448,971.90 × 221,311.60
  4. Step 4: Simplify right side
    300,043.60x = 99,362,689,544.04
  5. Step 5: Solve for x
    x = 99,362,689,544.04/300,043.60
  6. Step 6: Final answer
    x = 331,160.84

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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.