Home / 1,187,651.07-1,638,952.52-643,784.67

Finding the Fourth Proportional to 1,187,651.07, 1,638,952.52 and 643,784.67

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Solution

The fourth proportional to 1,187,651.07, 1,638,952.52 and 643,784.67 is: 888,419.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,651.07 : 1,638,952.52 = 643,784.67 : x
  2. Step 2: Convert to fraction form
    1,187,651.07/1,638,952.52 = 643,784.67/x
  3. Step 3: Cross multiply
    1,187,651.07x = 1,638,952.52 × 643,784.67
  4. Step 4: Simplify right side
    1,187,651.07x = 1,055,132,504,014.95
  5. Step 5: Solve for x
    x = 1,055,132,504,014.95/1,187,651.07
  6. Step 6: Final answer
    x = 888,419.61

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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.