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Finding the Fourth Proportional to 485,629.60, 729,999.60 and 346,352.80

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Solution

The fourth proportional to 485,629.60, 729,999.60 and 346,352.80 is: 520,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,629.60 : 729,999.60 = 346,352.80 : x
  2. Step 2: Convert to fraction form
    485,629.60/729,999.60 = 346,352.80/x
  3. Step 3: Cross multiply
    485,629.60x = 729,999.60 × 346,352.80
  4. Step 4: Simplify right side
    485,629.60x = 252,837,405,458.88
  5. Step 5: Solve for x
    x = 252,837,405,458.88/485,629.60
  6. Step 6: Final answer
    x = 520,638.37

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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.