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Finding the Fourth Proportional to 1,186.89, 1,779.64 and 492.97

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Solution

The fourth proportional to 1,186.89, 1,779.64 and 492.97 is: 739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.89 : 1,779.64 = 492.97 : x
  2. Step 2: Convert to fraction form
    1,186.89/1,779.64 = 492.97/x
  3. Step 3: Cross multiply
    1,186.89x = 1,779.64 × 492.97
  4. Step 4: Simplify right side
    1,186.89x = 877,309.13
  5. Step 5: Solve for x
    x = 877,309.13/1,186.89
  6. Step 6: Final answer
    x = 739.17

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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.