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Finding the Fourth Proportional to 1,152.23, 1,589.54 and 679.97

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Solution

The fourth proportional to 1,152.23, 1,589.54 and 679.97 is: 938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.23 : 1,589.54 = 679.97 : x
  2. Step 2: Convert to fraction form
    1,152.23/1,589.54 = 679.97/x
  3. Step 3: Cross multiply
    1,152.23x = 1,589.54 × 679.97
  4. Step 4: Simplify right side
    1,152.23x = 1,080,840.09
  5. Step 5: Solve for x
    x = 1,080,840.09/1,152.23
  6. Step 6: Final answer
    x = 938.05

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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.