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Finding the Fourth Proportional to 1,187.66, 1,777.39 and 941.63

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Solution

The fourth proportional to 1,187.66, 1,777.39 and 941.63 is: 1,409.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.66 : 1,777.39 = 941.63 : x
  2. Step 2: Convert to fraction form
    1,187.66/1,777.39 = 941.63/x
  3. Step 3: Cross multiply
    1,187.66x = 1,777.39 × 941.63
  4. Step 4: Simplify right side
    1,187.66x = 1,673,637.80
  5. Step 5: Solve for x
    x = 1,673,637.80/1,187.66
  6. Step 6: Final answer
    x = 1,409.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.