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Finding the Fourth Proportional to 259,840.20, 389,889.90 and 147,606.60

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Solution

The fourth proportional to 259,840.20, 389,889.90 and 147,606.60 is: 221,483.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,840.20 : 389,889.90 = 147,606.60 : x
  2. Step 2: Convert to fraction form
    259,840.20/389,889.90 = 147,606.60/x
  3. Step 3: Cross multiply
    259,840.20x = 389,889.90 × 147,606.60
  4. Step 4: Simplify right side
    259,840.20x = 57,550,322,513.34
  5. Step 5: Solve for x
    x = 57,550,322,513.34/259,840.20
  6. Step 6: Final answer
    x = 221,483.52

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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.