Home / 1,299,205.20-1,948,807.80-820,908.30

Finding the Fourth Proportional to 1,299,205.20, 1,948,807.80 and 820,908.30

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Solution

The fourth proportional to 1,299,205.20, 1,948,807.80 and 820,908.30 is: 1,231,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,205.20 : 1,948,807.80 = 820,908.30 : x
  2. Step 2: Convert to fraction form
    1,299,205.20/1,948,807.80 = 820,908.30/x
  3. Step 3: Cross multiply
    1,299,205.20x = 1,948,807.80 × 820,908.30
  4. Step 4: Simplify right side
    1,299,205.20x = 1,599,792,498,124.74
  5. Step 5: Solve for x
    x = 1,599,792,498,124.74/1,299,205.20
  6. Step 6: Final answer
    x = 1,231,362.45

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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.