Home / 259,931.76-389,353.73-209,055.81

Finding the Fourth Proportional to 259,931.76, 389,353.73 and 209,055.81

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Solution

The fourth proportional to 259,931.76, 389,353.73 and 209,055.81 is: 313,146.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,931.76 : 389,353.73 = 209,055.81 : x
  2. Step 2: Convert to fraction form
    259,931.76/389,353.73 = 209,055.81/x
  3. Step 3: Cross multiply
    259,931.76x = 389,353.73 × 209,055.81
  4. Step 4: Simplify right side
    259,931.76x = 81,396,660,600.43
  5. Step 5: Solve for x
    x = 81,396,660,600.43/259,931.76
  6. Step 6: Final answer
    x = 313,146.27

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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.