Home / 259,775.40-389,663.10-221,721.60

Finding the Fourth Proportional to 259,775.40, 389,663.10 and 221,721.60

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Solution

The fourth proportional to 259,775.40, 389,663.10 and 221,721.60 is: 332,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,775.40 : 389,663.10 = 221,721.60 : x
  2. Step 2: Convert to fraction form
    259,775.40/389,663.10 = 221,721.60/x
  3. Step 3: Cross multiply
    259,775.40x = 389,663.10 × 221,721.60
  4. Step 4: Simplify right side
    259,775.40x = 86,396,725,992.96
  5. Step 5: Solve for x
    x = 86,396,725,992.96/259,775.40
  6. Step 6: Final answer
    x = 332,582.40

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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.