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Finding the Fourth Proportional to 485,930.60, 728,636.70 and 205,130.60

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Solution

The fourth proportional to 485,930.60, 728,636.70 and 205,130.60 is: 307,586.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,930.60 : 728,636.70 = 205,130.60 : x
  2. Step 2: Convert to fraction form
    485,930.60/728,636.70 = 205,130.60/x
  3. Step 3: Cross multiply
    485,930.60x = 728,636.70 × 205,130.60
  4. Step 4: Simplify right side
    485,930.60x = 149,465,683,453.02
  5. Step 5: Solve for x
    x = 149,465,683,453.02/485,930.60
  6. Step 6: Final answer
    x = 307,586.48

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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.