Home / 1,239,694.80-1,856,431.80-816,680.40

Finding the Fourth Proportional to 1,239,694.80, 1,856,431.80 and 816,680.40

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Solution

The fourth proportional to 1,239,694.80, 1,856,431.80 and 816,680.40 is: 1,222,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239,694.80 : 1,856,431.80 = 816,680.40 : x
  2. Step 2: Convert to fraction form
    1,239,694.80/1,856,431.80 = 816,680.40/x
  3. Step 3: Cross multiply
    1,239,694.80x = 1,856,431.80 × 816,680.40
  4. Step 4: Simplify right side
    1,239,694.80x = 1,516,111,464,996.72
  5. Step 5: Solve for x
    x = 1,516,111,464,996.72/1,239,694.80
  6. Step 6: Final answer
    x = 1,222,971.55

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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.