Home / 427,765.70-641,388.72-214,285.34

Finding the Fourth Proportional to 427,765.70, 641,388.72 and 214,285.34

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Solution

The fourth proportional to 427,765.70, 641,388.72 and 214,285.34 is: 321,297.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,765.70 : 641,388.72 = 214,285.34 : x
  2. Step 2: Convert to fraction form
    427,765.70/641,388.72 = 214,285.34/x
  3. Step 3: Cross multiply
    427,765.70x = 641,388.72 × 214,285.34
  4. Step 4: Simplify right side
    427,765.70x = 137,440,199,937.37
  5. Step 5: Solve for x
    x = 137,440,199,937.37/427,765.70
  6. Step 6: Final answer
    x = 321,297.85

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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.