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Finding the Fourth Proportional to 322,402.78, 483,603.56 and 85,745.69

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Solution

The fourth proportional to 322,402.78, 483,603.56 and 85,745.69 is: 128,618.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,402.78 : 483,603.56 = 85,745.69 : x
  2. Step 2: Convert to fraction form
    322,402.78/483,603.56 = 85,745.69/x
  3. Step 3: Cross multiply
    322,402.78x = 483,603.56 × 85,745.69
  4. Step 4: Simplify right side
    322,402.78x = 41,466,918,091.91
  5. Step 5: Solve for x
    x = 41,466,918,091.91/322,402.78
  6. Step 6: Final answer
    x = 128,618.37

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1.5x scale

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.