Home / 1,388,865.29-1,916,556.49-776,899.89

Finding the Fourth Proportional to 1,388,865.29, 1,916,556.49 and 776,899.89

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Solution

The fourth proportional to 1,388,865.29, 1,916,556.49 and 776,899.89 is: 1,072,078.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,865.29 : 1,916,556.49 = 776,899.89 : x
  2. Step 2: Convert to fraction form
    1,388,865.29/1,916,556.49 = 776,899.89/x
  3. Step 3: Cross multiply
    1,388,865.29x = 1,916,556.49 × 776,899.89
  4. Step 4: Simplify right side
    1,388,865.29x = 1,488,972,527,230.91
  5. Step 5: Solve for x
    x = 1,488,972,527,230.91/1,388,865.29
  6. Step 6: Final answer
    x = 1,072,078.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.