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Finding the Fourth Proportional to 1,157.23, 1,596.96 and 691.39

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Solution

The fourth proportional to 1,157.23, 1,596.96 and 691.39 is: 954.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.23 : 1,596.96 = 691.39 : x
  2. Step 2: Convert to fraction form
    1,157.23/1,596.96 = 691.39/x
  3. Step 3: Cross multiply
    1,157.23x = 1,596.96 × 691.39
  4. Step 4: Simplify right side
    1,157.23x = 1,104,122.17
  5. Step 5: Solve for x
    x = 1,104,122.17/1,157.23
  6. Step 6: Final answer
    x = 954.11

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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.