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Finding the Fourth Proportional to 1,156.96, 1,735.32 and 636.79

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Solution

The fourth proportional to 1,156.96, 1,735.32 and 636.79 is: 955.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.96 : 1,735.32 = 636.79 : x
  2. Step 2: Convert to fraction form
    1,156.96/1,735.32 = 636.79/x
  3. Step 3: Cross multiply
    1,156.96x = 1,735.32 × 636.79
  4. Step 4: Simplify right side
    1,156.96x = 1,105,025.75
  5. Step 5: Solve for x
    x = 1,105,025.75/1,156.96
  6. Step 6: Final answer
    x = 955.12

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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.