Home / 1,388,853.89-1,916,692.82-776,970.15

Finding the Fourth Proportional to 1,388,853.89, 1,916,692.82 and 776,970.15

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Solution

The fourth proportional to 1,388,853.89, 1,916,692.82 and 776,970.15 is: 1,072,260.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,853.89 : 1,916,692.82 = 776,970.15 : x
  2. Step 2: Convert to fraction form
    1,388,853.89/1,916,692.82 = 776,970.15/x
  3. Step 3: Cross multiply
    1,388,853.89x = 1,916,692.82 × 776,970.15
  4. Step 4: Simplify right side
    1,388,853.89x = 1,489,213,103,974.47
  5. Step 5: Solve for x
    x = 1,489,213,103,974.47/1,388,853.89
  6. Step 6: Final answer
    x = 1,072,260.46

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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.