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Finding the Fourth Proportional to 1,257,621.36, 1,735,743.82 and 741,344.48

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Solution

The fourth proportional to 1,257,621.36, 1,735,743.82 and 741,344.48 is: 1,023,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257,621.36 : 1,735,743.82 = 741,344.48 : x
  2. Step 2: Convert to fraction form
    1,257,621.36/1,735,743.82 = 741,344.48/x
  3. Step 3: Cross multiply
    1,257,621.36x = 1,735,743.82 × 741,344.48
  4. Step 4: Simplify right side
    1,257,621.36x = 1,286,784,090,572.52
  5. Step 5: Solve for x
    x = 1,286,784,090,572.52/1,257,621.36
  6. Step 6: Final answer
    x = 1,023,188.80

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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.