Home / 812,258.28-1,218,389.85-279,772.38

Finding the Fourth Proportional to 812,258.28, 1,218,389.85 and 279,772.38

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Solution

The fourth proportional to 812,258.28, 1,218,389.85 and 279,772.38 is: 419,659.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,258.28 : 1,218,389.85 = 279,772.38 : x
  2. Step 2: Convert to fraction form
    812,258.28/1,218,389.85 = 279,772.38/x
  3. Step 3: Cross multiply
    812,258.28x = 1,218,389.85 × 279,772.38
  4. Step 4: Simplify right side
    812,258.28x = 340,871,828,102.34
  5. Step 5: Solve for x
    x = 340,871,828,102.34/812,258.28
  6. Step 6: Final answer
    x = 419,659.41

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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.