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Finding the Fourth Proportional to 1,245,413, 1,718,671.86 and 708,869

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Solution

The fourth proportional to 1,245,413, 1,718,671.86 and 708,869 is: 978,240.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,413 : 1,718,671.86 = 708,869 : x
  2. Step 2: Convert to fraction form
    1,245,413/1,718,671.86 = 708,869/x
  3. Step 3: Cross multiply
    1,245,413x = 1,718,671.86 × 708,869
  4. Step 4: Simplify right side
    1,245,413x = 1,218,313,202,726.34
  5. Step 5: Solve for x
    x = 1,218,313,202,726.34/1,245,413
  6. Step 6: Final answer
    x = 978,240.31

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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.