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Finding the Fourth Proportional to 1,076.24, 1,485.28 and 662

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Solution

The fourth proportional to 1,076.24, 1,485.28 and 662 is: 913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.24 : 1,485.28 = 662 : x
  2. Step 2: Convert to fraction form
    1,076.24/1,485.28 = 662/x
  3. Step 3: Cross multiply
    1,076.24x = 1,485.28 × 662
  4. Step 4: Simplify right side
    1,076.24x = 983,255.36
  5. Step 5: Solve for x
    x = 983,255.36/1,076.24
  6. Step 6: Final answer
    x = 913.60

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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.