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Finding the Fourth Proportional to 405,272.20, 607,252.20 and 381,652.60

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Solution

The fourth proportional to 405,272.20, 607,252.20 and 381,652.60 is: 571,861.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,272.20 : 607,252.20 = 381,652.60 : x
  2. Step 2: Convert to fraction form
    405,272.20/607,252.20 = 381,652.60/x
  3. Step 3: Cross multiply
    405,272.20x = 607,252.20 × 381,652.60
  4. Step 4: Simplify right side
    405,272.20x = 231,759,380,985.72
  5. Step 5: Solve for x
    x = 231,759,380,985.72/405,272.20
  6. Step 6: Final answer
    x = 571,861.04

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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.