Home / 1,388,691.90-1,916,317.74-776,726.44

Finding the Fourth Proportional to 1,388,691.90, 1,916,317.74 and 776,726.44

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Solution

The fourth proportional to 1,388,691.90, 1,916,317.74 and 776,726.44 is: 1,071,839.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,691.90 : 1,916,317.74 = 776,726.44 : x
  2. Step 2: Convert to fraction form
    1,388,691.90/1,916,317.74 = 776,726.44/x
  3. Step 3: Cross multiply
    1,388,691.90x = 1,916,317.74 × 776,726.44
  4. Step 4: Simplify right side
    1,388,691.90x = 1,488,454,656,099.05
  5. Step 5: Solve for x
    x = 1,488,454,656,099.05/1,388,691.90
  6. Step 6: Final answer
    x = 1,071,839.37

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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.