Home / 1,388,791.69-1,916,488.48-776,955.15

Finding the Fourth Proportional to 1,388,791.69, 1,916,488.48 and 776,955.15

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Solution

The fourth proportional to 1,388,791.69, 1,916,488.48 and 776,955.15 is: 1,072,173.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,791.69 : 1,916,488.48 = 776,955.15 : x
  2. Step 2: Convert to fraction form
    1,388,791.69/1,916,488.48 = 776,955.15/x
  3. Step 3: Cross multiply
    1,388,791.69x = 1,916,488.48 × 776,955.15
  4. Step 4: Simplify right side
    1,388,791.69x = 1,489,025,594,451.67
  5. Step 5: Solve for x
    x = 1,489,025,594,451.67/1,388,791.69
  6. Step 6: Final answer
    x = 1,072,173.46

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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.