Home / 1,187,686.56-1,639,009.64-643,820.67

Finding the Fourth Proportional to 1,187,686.56, 1,639,009.64 and 643,820.67

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Solution

The fourth proportional to 1,187,686.56, 1,639,009.64 and 643,820.67 is: 888,473.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,686.56 : 1,639,009.64 = 643,820.67 : x
  2. Step 2: Convert to fraction form
    1,187,686.56/1,639,009.64 = 643,820.67/x
  3. Step 3: Cross multiply
    1,187,686.56x = 1,639,009.64 × 643,820.67
  4. Step 4: Simplify right side
    1,187,686.56x = 1,055,228,286,170.81
  5. Step 5: Solve for x
    x = 1,055,228,286,170.81/1,187,686.56
  6. Step 6: Final answer
    x = 888,473.71

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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.