Home / 2,986.20-4,479.54-1,686.36

Finding the Fourth Proportional to 2,986.20, 4,479.54 and 1,686.36

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Solution

The fourth proportional to 2,986.20, 4,479.54 and 1,686.36 is: 2,529.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.20 : 4,479.54 = 1,686.36 : x
  2. Step 2: Convert to fraction form
    2,986.20/4,479.54 = 1,686.36/x
  3. Step 3: Cross multiply
    2,986.20x = 4,479.54 × 1,686.36
  4. Step 4: Simplify right side
    2,986.20x = 7,554,117.07
  5. Step 5: Solve for x
    x = 7,554,117.07/2,986.20
  6. Step 6: Final answer
    x = 2,529.68

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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.