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Finding the Fourth Proportional to 403,736.60, 606,917.10 and 345,999.80

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Solution

The fourth proportional to 403,736.60, 606,917.10 and 345,999.80 is: 520,124.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,736.60 : 606,917.10 = 345,999.80 : x
  2. Step 2: Convert to fraction form
    403,736.60/606,917.10 = 345,999.80/x
  3. Step 3: Cross multiply
    403,736.60x = 606,917.10 × 345,999.80
  4. Step 4: Simplify right side
    403,736.60x = 209,993,195,216.58
  5. Step 5: Solve for x
    x = 209,993,195,216.58/403,736.60
  6. Step 6: Final answer
    x = 520,124.25

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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.