Home / 1,187,980.68-1,639,420.64-644,111.71

Finding the Fourth Proportional to 1,187,980.68, 1,639,420.64 and 644,111.71

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Solution

The fourth proportional to 1,187,980.68, 1,639,420.64 and 644,111.71 is: 888,878.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,980.68 : 1,639,420.64 = 644,111.71 : x
  2. Step 2: Convert to fraction form
    1,187,980.68/1,639,420.64 = 644,111.71/x
  3. Step 3: Cross multiply
    1,187,980.68x = 1,639,420.64 × 644,111.71
  4. Step 4: Simplify right side
    1,187,980.68x = 1,055,970,028,619.14
  5. Step 5: Solve for x
    x = 1,055,970,028,619.14/1,187,980.68
  6. Step 6: Final answer
    x = 888,878.12

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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.