Home / 1,186.20-1,779.84-747.34

Finding the Fourth Proportional to 1,186.20, 1,779.84 and 747.34

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Solution

The fourth proportional to 1,186.20, 1,779.84 and 747.34 is: 1,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.20 : 1,779.84 = 747.34 : x
  2. Step 2: Convert to fraction form
    1,186.20/1,779.84 = 747.34/x
  3. Step 3: Cross multiply
    1,186.20x = 1,779.84 × 747.34
  4. Step 4: Simplify right side
    1,186.20x = 1,330,145.63
  5. Step 5: Solve for x
    x = 1,330,145.63/1,186.20
  6. Step 6: Final answer
    x = 1,121.35

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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.