Home / 1,187,685.56-1,639,008.26-643,819.67

Finding the Fourth Proportional to 1,187,685.56, 1,639,008.26 and 643,819.67

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Solution

The fourth proportional to 1,187,685.56, 1,639,008.26 and 643,819.67 is: 888,472.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,685.56 : 1,639,008.26 = 643,819.67 : x
  2. Step 2: Convert to fraction form
    1,187,685.56/1,639,008.26 = 643,819.67/x
  3. Step 3: Cross multiply
    1,187,685.56x = 1,639,008.26 × 643,819.67
  4. Step 4: Simplify right side
    1,187,685.56x = 1,055,225,754,592.50
  5. Step 5: Solve for x
    x = 1,055,225,754,592.50/1,187,685.56
  6. Step 6: Final answer
    x = 888,472.33

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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.