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Finding the Fourth Proportional to 1,245,412, 1,718,670.48 and 708,868

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Solution

The fourth proportional to 1,245,412, 1,718,670.48 and 708,868 is: 978,238.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,412 : 1,718,670.48 = 708,868 : x
  2. Step 2: Convert to fraction form
    1,245,412/1,718,670.48 = 708,868/x
  3. Step 3: Cross multiply
    1,245,412x = 1,718,670.48 × 708,868
  4. Step 4: Simplify right side
    1,245,412x = 1,218,310,505,816.64
  5. Step 5: Solve for x
    x = 1,218,310,505,816.64/1,245,412
  6. Step 6: Final answer
    x = 978,238.93

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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.