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Finding the Fourth Proportional to 305,910.10, 458,865.15 and 221,491.90

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Solution

The fourth proportional to 305,910.10, 458,865.15 and 221,491.90 is: 332,237.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,910.10 : 458,865.15 = 221,491.90 : x
  2. Step 2: Convert to fraction form
    305,910.10/458,865.15 = 221,491.90/x
  3. Step 3: Cross multiply
    305,910.10x = 458,865.15 × 221,491.90
  4. Step 4: Simplify right side
    305,910.10x = 101,634,913,917.29
  5. Step 5: Solve for x
    x = 101,634,913,917.29/305,910.10
  6. Step 6: Final answer
    x = 332,237.85

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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.