Home / 1,186.27-1,637.60-891.63

Finding the Fourth Proportional to 1,186.27, 1,637.60 and 891.63

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Solution

The fourth proportional to 1,186.27, 1,637.60 and 891.63 is: 1,230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.27 : 1,637.60 = 891.63 : x
  2. Step 2: Convert to fraction form
    1,186.27/1,637.60 = 891.63/x
  3. Step 3: Cross multiply
    1,186.27x = 1,637.60 × 891.63
  4. Step 4: Simplify right side
    1,186.27x = 1,460,128.83
  5. Step 5: Solve for x
    x = 1,460,128.83/1,186.27
  6. Step 6: Final answer
    x = 1,230.86

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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.