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Finding the Fourth Proportional to 1,253,365, 1,729,645.86 and 716,821

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Solution

The fourth proportional to 1,253,365, 1,729,645.86 and 716,821 is: 989,214.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253,365 : 1,729,645.86 = 716,821 : x
  2. Step 2: Convert to fraction form
    1,253,365/1,729,645.86 = 716,821/x
  3. Step 3: Cross multiply
    1,253,365x = 1,729,645.86 × 716,821
  4. Step 4: Simplify right side
    1,253,365x = 1,239,846,475,011.06
  5. Step 5: Solve for x
    x = 1,239,846,475,011.06/1,253,365
  6. Step 6: Final answer
    x = 989,214.22

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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.