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Finding the Fourth Proportional to 1,168.81, 1,612.99 and 671.54

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Solution

The fourth proportional to 1,168.81, 1,612.99 and 671.54 is: 926.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.81 : 1,612.99 = 671.54 : x
  2. Step 2: Convert to fraction form
    1,168.81/1,612.99 = 671.54/x
  3. Step 3: Cross multiply
    1,168.81x = 1,612.99 × 671.54
  4. Step 4: Simplify right side
    1,168.81x = 1,083,187.30
  5. Step 5: Solve for x
    x = 1,083,187.30/1,168.81
  6. Step 6: Final answer
    x = 926.74

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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.