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Finding the Fourth Proportional to 260,328.60, 389,628.90 and 189,048.60

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Solution

The fourth proportional to 260,328.60, 389,628.90 and 189,048.60 is: 282,945.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,328.60 : 389,628.90 = 189,048.60 : x
  2. Step 2: Convert to fraction form
    260,328.60/389,628.90 = 189,048.60/x
  3. Step 3: Cross multiply
    260,328.60x = 389,628.90 × 189,048.60
  4. Step 4: Simplify right side
    260,328.60x = 73,658,798,064.54
  5. Step 5: Solve for x
    x = 73,658,798,064.54/260,328.60
  6. Step 6: Final answer
    x = 282,945.47

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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.