Home / 1,213,120.20-1,821,177.90-763,840.20

Finding the Fourth Proportional to 1,213,120.20, 1,821,177.90 and 763,840.20

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Solution

The fourth proportional to 1,213,120.20, 1,821,177.90 and 763,840.20 is: 1,146,703.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,120.20 : 1,821,177.90 = 763,840.20 : x
  2. Step 2: Convert to fraction form
    1,213,120.20/1,821,177.90 = 763,840.20/x
  3. Step 3: Cross multiply
    1,213,120.20x = 1,821,177.90 × 763,840.20
  4. Step 4: Simplify right side
    1,213,120.20x = 1,391,088,891,371.58
  5. Step 5: Solve for x
    x = 1,391,088,891,371.58/1,213,120.20
  6. Step 6: Final answer
    x = 1,146,703.26

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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.