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Finding the Fourth Proportional to 1,076.33, 1,485.39 and 634.52

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Solution

The fourth proportional to 1,076.33, 1,485.39 and 634.52 is: 875.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.33 : 1,485.39 = 634.52 : x
  2. Step 2: Convert to fraction form
    1,076.33/1,485.39 = 634.52/x
  3. Step 3: Cross multiply
    1,076.33x = 1,485.39 × 634.52
  4. Step 4: Simplify right side
    1,076.33x = 942,502.24
  5. Step 5: Solve for x
    x = 942,502.24/1,076.33
  6. Step 6: Final answer
    x = 875.67

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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.