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Finding the Fourth Proportional to 406.36, 613.75 and 406.36

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Solution

The fourth proportional to 406.36, 613.75 and 406.36 is: 613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.36 : 613.75 = 406.36 : x
  2. Step 2: Convert to fraction form
    406.36/613.75 = 406.36/x
  3. Step 3: Cross multiply
    406.36x = 613.75 × 406.36
  4. Step 4: Simplify right side
    406.36x = 249,403.45
  5. Step 5: Solve for x
    x = 249,403.45/406.36
  6. Step 6: Final answer
    x = 613.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.