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Finding the Fourth Proportional to 322,408.78, 483,612.55 and 85,751.71

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Solution

The fourth proportional to 322,408.78, 483,612.55 and 85,751.71 is: 128,627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,408.78 : 483,612.55 = 85,751.71 : x
  2. Step 2: Convert to fraction form
    322,408.78/483,612.55 = 85,751.71/x
  3. Step 3: Cross multiply
    322,408.78x = 483,612.55 × 85,751.71
  4. Step 4: Simplify right side
    322,408.78x = 41,470,603,139.96
  5. Step 5: Solve for x
    x = 41,470,603,139.96/322,408.78
  6. Step 6: Final answer
    x = 128,627.40

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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.