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Finding the Fourth Proportional to 1,161, 1,597.32 and 865.08

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Solution

The fourth proportional to 1,161, 1,597.32 and 865.08 is: 1,190.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161 : 1,597.32 = 865.08 : x
  2. Step 2: Convert to fraction form
    1,161/1,597.32 = 865.08/x
  3. Step 3: Cross multiply
    1,161x = 1,597.32 × 865.08
  4. Step 4: Simplify right side
    1,161x = 1,381,809.59
  5. Step 5: Solve for x
    x = 1,381,809.59/1,161
  6. Step 6: Final answer
    x = 1,190.19

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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.