Home / 812,989.40-1,218,991.62-363,626.51

Finding the Fourth Proportional to 812,989.40, 1,218,991.62 and 363,626.51

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Solution

The fourth proportional to 812,989.40, 1,218,991.62 and 363,626.51 is: 545,219.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,989.40 : 1,218,991.62 = 363,626.51 : x
  2. Step 2: Convert to fraction form
    812,989.40/1,218,991.62 = 363,626.51/x
  3. Step 3: Cross multiply
    812,989.40x = 1,218,991.62 × 363,626.51
  4. Step 4: Simplify right side
    812,989.40x = 443,257,668,499.85
  5. Step 5: Solve for x
    x = 443,257,668,499.85/812,989.40
  6. Step 6: Final answer
    x = 545,219.49

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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.