Home / 1,388,814.40-1,916,740.16-777,001.28

Finding the Fourth Proportional to 1,388,814.40, 1,916,740.16 and 777,001.28

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Solution

The fourth proportional to 1,388,814.40, 1,916,740.16 and 777,001.28 is: 1,072,360.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,814.40 : 1,916,740.16 = 777,001.28 : x
  2. Step 2: Convert to fraction form
    1,388,814.40/1,916,740.16 = 777,001.28/x
  3. Step 3: Cross multiply
    1,388,814.40x = 1,916,740.16 × 777,001.28
  4. Step 4: Simplify right side
    1,388,814.40x = 1,489,309,557,747.40
  5. Step 5: Solve for x
    x = 1,489,309,557,747.40/1,388,814.40
  6. Step 6: Final answer
    x = 1,072,360.39

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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.