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Finding the Fourth Proportional to 221,428.60, 332,142.90 and 219,460.30

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Solution

The fourth proportional to 221,428.60, 332,142.90 and 219,460.30 is: 329,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,428.60 : 332,142.90 = 219,460.30 : x
  2. Step 2: Convert to fraction form
    221,428.60/332,142.90 = 219,460.30/x
  3. Step 3: Cross multiply
    221,428.60x = 332,142.90 × 219,460.30
  4. Step 4: Simplify right side
    221,428.60x = 72,892,180,476.87
  5. Step 5: Solve for x
    x = 72,892,180,476.87/221,428.60
  6. Step 6: Final answer
    x = 329,190.45

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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.