Home / 1,388,172.69-1,915,776-776,382.39

Finding the Fourth Proportional to 1,388,172.69, 1,915,776 and 776,382.39

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Solution

The fourth proportional to 1,388,172.69, 1,915,776 and 776,382.39 is: 1,071,462.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,172.69 : 1,915,776 = 776,382.39 : x
  2. Step 2: Convert to fraction form
    1,388,172.69/1,915,776 = 776,382.39/x
  3. Step 3: Cross multiply
    1,388,172.69x = 1,915,776 × 776,382.39
  4. Step 4: Simplify right side
    1,388,172.69x = 1,487,374,749,584.64
  5. Step 5: Solve for x
    x = 1,487,374,749,584.64/1,388,172.69
  6. Step 6: Final answer
    x = 1,071,462.33

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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.