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Finding the Fourth Proportional to 1,157.93, 1,597.69 and 685.97

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Solution

The fourth proportional to 1,157.93, 1,597.69 and 685.97 is: 946.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.93 : 1,597.69 = 685.97 : x
  2. Step 2: Convert to fraction form
    1,157.93/1,597.69 = 685.97/x
  3. Step 3: Cross multiply
    1,157.93x = 1,597.69 × 685.97
  4. Step 4: Simplify right side
    1,157.93x = 1,095,963.98
  5. Step 5: Solve for x
    x = 1,095,963.98/1,157.93
  6. Step 6: Final answer
    x = 946.49

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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.