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Finding the Fourth Proportional to 983.06, 1,475.26 and 636.56

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Solution

The fourth proportional to 983.06, 1,475.26 and 636.56 is: 955.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.06 : 1,475.26 = 636.56 : x
  2. Step 2: Convert to fraction form
    983.06/1,475.26 = 636.56/x
  3. Step 3: Cross multiply
    983.06x = 1,475.26 × 636.56
  4. Step 4: Simplify right side
    983.06x = 939,091.51
  5. Step 5: Solve for x
    x = 939,091.51/983.06
  6. Step 6: Final answer
    x = 955.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.