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Finding the Fourth Proportional to 300,209.60, 449,220.90 and 221,477.60

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Solution

The fourth proportional to 300,209.60, 449,220.90 and 221,477.60 is: 331,409.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,209.60 : 449,220.90 = 221,477.60 : x
  2. Step 2: Convert to fraction form
    300,209.60/449,220.90 = 221,477.60/x
  3. Step 3: Cross multiply
    300,209.60x = 449,220.90 × 221,477.60
  4. Step 4: Simplify right side
    300,209.60x = 99,492,366,801.84
  5. Step 5: Solve for x
    x = 99,492,366,801.84/300,209.60
  6. Step 6: Final answer
    x = 331,409.68

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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.