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Finding the Fourth Proportional to 860.94, 1,190.28 and 762.48

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Solution

The fourth proportional to 860.94, 1,190.28 and 762.48 is: 1,054.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.94 : 1,190.28 = 762.48 : x
  2. Step 2: Convert to fraction form
    860.94/1,190.28 = 762.48/x
  3. Step 3: Cross multiply
    860.94x = 1,190.28 × 762.48
  4. Step 4: Simplify right side
    860.94x = 907,564.69
  5. Step 5: Solve for x
    x = 907,564.69/860.94
  6. Step 6: Final answer
    x = 1,054.16

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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.