Home / 1,388,790.69-1,916,487.10-776,954.15

Finding the Fourth Proportional to 1,388,790.69, 1,916,487.10 and 776,954.15

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Solution

The fourth proportional to 1,388,790.69, 1,916,487.10 and 776,954.15 is: 1,072,172.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,790.69 : 1,916,487.10 = 776,954.15 : x
  2. Step 2: Convert to fraction form
    1,388,790.69/1,916,487.10 = 776,954.15/x
  3. Step 3: Cross multiply
    1,388,790.69x = 1,916,487.10 × 776,954.15
  4. Step 4: Simplify right side
    1,388,790.69x = 1,489,022,605,766.47
  5. Step 5: Solve for x
    x = 1,489,022,605,766.47/1,388,790.69
  6. Step 6: Final answer
    x = 1,072,172.08

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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.