Home / 1,299,209.70-1,948,814.55-820,912.80

Finding the Fourth Proportional to 1,299,209.70, 1,948,814.55 and 820,912.80

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Solution

The fourth proportional to 1,299,209.70, 1,948,814.55 and 820,912.80 is: 1,231,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,209.70 : 1,948,814.55 = 820,912.80 : x
  2. Step 2: Convert to fraction form
    1,299,209.70/1,948,814.55 = 820,912.80/x
  3. Step 3: Cross multiply
    1,299,209.70x = 1,948,814.55 × 820,912.80
  4. Step 4: Simplify right side
    1,299,209.70x = 1,599,806,808,921.24
  5. Step 5: Solve for x
    x = 1,599,806,808,921.24/1,299,209.70
  6. Step 6: Final answer
    x = 1,231,369.20

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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.