Home / 1,311.55-1,967.69-1,090.99

Finding the Fourth Proportional to 1,311.55, 1,967.69 and 1,090.99

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Solution

The fourth proportional to 1,311.55, 1,967.69 and 1,090.99 is: 1,636.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.55 : 1,967.69 = 1,090.99 : x
  2. Step 2: Convert to fraction form
    1,311.55/1,967.69 = 1,090.99/x
  3. Step 3: Cross multiply
    1,311.55x = 1,967.69 × 1,090.99
  4. Step 4: Simplify right side
    1,311.55x = 2,146,740.83
  5. Step 5: Solve for x
    x = 2,146,740.83/1,311.55
  6. Step 6: Final answer
    x = 1,636.79

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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.