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Finding the Fourth Proportional to 213,426.60, 320,139.90 and 201,179.40

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Solution

The fourth proportional to 213,426.60, 320,139.90 and 201,179.40 is: 301,769.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,426.60 : 320,139.90 = 201,179.40 : x
  2. Step 2: Convert to fraction form
    213,426.60/320,139.90 = 201,179.40/x
  3. Step 3: Cross multiply
    213,426.60x = 320,139.90 × 201,179.40
  4. Step 4: Simplify right side
    213,426.60x = 64,405,552,998.06
  5. Step 5: Solve for x
    x = 64,405,552,998.06/213,426.60
  6. Step 6: Final answer
    x = 301,769.10

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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.