Home / 1,388,791.36-1,916,514.84-815,883.76

Finding the Fourth Proportional to 1,388,791.36, 1,916,514.84 and 815,883.76

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Solution

The fourth proportional to 1,388,791.36, 1,916,514.84 and 815,883.76 is: 1,125,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,791.36 : 1,916,514.84 = 815,883.76 : x
  2. Step 2: Convert to fraction form
    1,388,791.36/1,916,514.84 = 815,883.76/x
  3. Step 3: Cross multiply
    1,388,791.36x = 1,916,514.84 × 815,883.76
  4. Step 4: Simplify right side
    1,388,791.36x = 1,563,653,333,755.00
  5. Step 5: Solve for x
    x = 1,563,653,333,755.00/1,388,791.36
  6. Step 6: Final answer
    x = 1,125,909.46

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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.