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Finding the Fourth Proportional to 1,290,959.98, 1,934,668.41 and 816,796.51

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Solution

The fourth proportional to 1,290,959.98, 1,934,668.41 and 816,796.51 is: 1,224,073.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,959.98 : 1,934,668.41 = 816,796.51 : x
  2. Step 2: Convert to fraction form
    1,290,959.98/1,934,668.41 = 816,796.51/x
  3. Step 3: Cross multiply
    1,290,959.98x = 1,934,668.41 × 816,796.51
  4. Step 4: Simplify right side
    1,290,959.98x = 1,580,230,405,295.25
  5. Step 5: Solve for x
    x = 1,580,230,405,295.25/1,290,959.98
  6. Step 6: Final answer
    x = 1,224,073.89

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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.