Home / 1,215,319.20-1,821,812.40-945,297.60

Finding the Fourth Proportional to 1,215,319.20, 1,821,812.40 and 945,297.60

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Solution

The fourth proportional to 1,215,319.20, 1,821,812.40 and 945,297.60 is: 1,417,039.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,319.20 : 1,821,812.40 = 945,297.60 : x
  2. Step 2: Convert to fraction form
    1,215,319.20/1,821,812.40 = 945,297.60/x
  3. Step 3: Cross multiply
    1,215,319.20x = 1,821,812.40 × 945,297.60
  4. Step 4: Simplify right side
    1,215,319.20x = 1,722,154,889,370.24
  5. Step 5: Solve for x
    x = 1,722,154,889,370.24/1,215,319.20
  6. Step 6: Final answer
    x = 1,417,039.15

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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.