Home / 1,686.24-2,530.44-1,405.44

Finding the Fourth Proportional to 1,686.24, 2,530.44 and 1,405.44

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Solution

The fourth proportional to 1,686.24, 2,530.44 and 1,405.44 is: 2,109.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.24 : 2,530.44 = 1,405.44 : x
  2. Step 2: Convert to fraction form
    1,686.24/2,530.44 = 1,405.44/x
  3. Step 3: Cross multiply
    1,686.24x = 2,530.44 × 1,405.44
  4. Step 4: Simplify right side
    1,686.24x = 3,556,381.59
  5. Step 5: Solve for x
    x = 3,556,381.59/1,686.24
  6. Step 6: Final answer
    x = 2,109.06

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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.