Home / 1,288,180.78-1,777,745.00-715,221

Finding the Fourth Proportional to 1,288,180.78, 1,777,745.00 and 715,221

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Solution

The fourth proportional to 1,288,180.78, 1,777,745.00 and 715,221 is: 987,035.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,180.78 : 1,777,745.00 = 715,221 : x
  2. Step 2: Convert to fraction form
    1,288,180.78/1,777,745.00 = 715,221/x
  3. Step 3: Cross multiply
    1,288,180.78x = 1,777,745.00 × 715,221
  4. Step 4: Simplify right side
    1,288,180.78x = 1,271,480,558,433.05
  5. Step 5: Solve for x
    x = 1,271,480,558,433.05/1,288,180.78
  6. Step 6: Final answer
    x = 987,035.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.