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Finding the Fourth Proportional to 213,998.40, 320,997.60 and 109,022.40

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Solution

The fourth proportional to 213,998.40, 320,997.60 and 109,022.40 is: 163,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,998.40 : 320,997.60 = 109,022.40 : x
  2. Step 2: Convert to fraction form
    213,998.40/320,997.60 = 109,022.40/x
  3. Step 3: Cross multiply
    213,998.40x = 320,997.60 × 109,022.40
  4. Step 4: Simplify right side
    213,998.40x = 34,995,928,746.24
  5. Step 5: Solve for x
    x = 34,995,928,746.24/213,998.40
  6. Step 6: Final answer
    x = 163,533.60

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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.