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Finding the Fourth Proportional to 215,622.40, 323,433.60 and 126,918.40

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Solution

The fourth proportional to 215,622.40, 323,433.60 and 126,918.40 is: 190,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,622.40 : 323,433.60 = 126,918.40 : x
  2. Step 2: Convert to fraction form
    215,622.40/323,433.60 = 126,918.40/x
  3. Step 3: Cross multiply
    215,622.40x = 323,433.60 × 126,918.40
  4. Step 4: Simplify right side
    215,622.40x = 41,049,675,018.24
  5. Step 5: Solve for x
    x = 41,049,675,018.24/215,622.40
  6. Step 6: Final answer
    x = 190,377.60

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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.