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Finding the Fourth Proportional to 449,056.91, 619,698.40 and 306,066.67

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Solution

The fourth proportional to 449,056.91, 619,698.40 and 306,066.67 is: 422,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,056.91 : 619,698.40 = 306,066.67 : x
  2. Step 2: Convert to fraction form
    449,056.91/619,698.40 = 306,066.67/x
  3. Step 3: Cross multiply
    449,056.91x = 619,698.40 × 306,066.67
  4. Step 4: Simplify right side
    449,056.91x = 189,669,023,377.92
  5. Step 5: Solve for x
    x = 189,669,023,377.92/449,056.91
  6. Step 6: Final answer
    x = 422,371.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.