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Finding the Fourth Proportional to 743,371.80, 1,115,100 and 210,850.80

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Solution

The fourth proportional to 743,371.80, 1,115,100 and 210,850.80 is: 316,288.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,371.80 : 1,115,100 = 210,850.80 : x
  2. Step 2: Convert to fraction form
    743,371.80/1,115,100 = 210,850.80/x
  3. Step 3: Cross multiply
    743,371.80x = 1,115,100 × 210,850.80
  4. Step 4: Simplify right side
    743,371.80x = 235,119,727,080
  5. Step 5: Solve for x
    x = 235,119,727,080/743,371.80
  6. Step 6: Final answer
    x = 316,288.20

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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.