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Finding the Fourth Proportional to 405,108.60, 607,662.90 and 109,620.60

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Solution

The fourth proportional to 405,108.60, 607,662.90 and 109,620.60 is: 164,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,108.60 : 607,662.90 = 109,620.60 : x
  2. Step 2: Convert to fraction form
    405,108.60/607,662.90 = 109,620.60/x
  3. Step 3: Cross multiply
    405,108.60x = 607,662.90 × 109,620.60
  4. Step 4: Simplify right side
    405,108.60x = 66,612,371,695.74
  5. Step 5: Solve for x
    x = 66,612,371,695.74/405,108.60
  6. Step 6: Final answer
    x = 164,430.90

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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.