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Finding the Fourth Proportional to 215,638.80, 323,400.60 and 65,878.80

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Solution

The fourth proportional to 215,638.80, 323,400.60 and 65,878.80 is: 98,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,638.80 : 323,400.60 = 65,878.80 : x
  2. Step 2: Convert to fraction form
    215,638.80/323,400.60 = 65,878.80/x
  3. Step 3: Cross multiply
    215,638.80x = 323,400.60 × 65,878.80
  4. Step 4: Simplify right side
    215,638.80x = 21,305,243,447.28
  5. Step 5: Solve for x
    x = 21,305,243,447.28/215,638.80
  6. Step 6: Final answer
    x = 98,800.60

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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.