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Finding the Fourth Proportional to 1,157.54, 1,735.09 and 718.79

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Solution

The fourth proportional to 1,157.54, 1,735.09 and 718.79 is: 1,077.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.54 : 1,735.09 = 718.79 : x
  2. Step 2: Convert to fraction form
    1,157.54/1,735.09 = 718.79/x
  3. Step 3: Cross multiply
    1,157.54x = 1,735.09 × 718.79
  4. Step 4: Simplify right side
    1,157.54x = 1,247,154.87
  5. Step 5: Solve for x
    x = 1,247,154.87/1,157.54
  6. Step 6: Final answer
    x = 1,077.42

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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.