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Finding the Fourth Proportional to 259,784.40, 389,676.60 and 221,730.60

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Solution

The fourth proportional to 259,784.40, 389,676.60 and 221,730.60 is: 332,595.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,784.40 : 389,676.60 = 221,730.60 : x
  2. Step 2: Convert to fraction form
    259,784.40/389,676.60 = 221,730.60/x
  3. Step 3: Cross multiply
    259,784.40x = 389,676.60 × 221,730.60
  4. Step 4: Simplify right side
    259,784.40x = 86,403,226,323.96
  5. Step 5: Solve for x
    x = 86,403,226,323.96/259,784.40
  6. Step 6: Final answer
    x = 332,595.90

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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.