Home / 1,679.94-2,515.65-1,405.35

Finding the Fourth Proportional to 1,679.94, 2,515.65 and 1,405.35

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Solution

The fourth proportional to 1,679.94, 2,515.65 and 1,405.35 is: 2,104.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.94 : 2,515.65 = 1,405.35 : x
  2. Step 2: Convert to fraction form
    1,679.94/2,515.65 = 1,405.35/x
  3. Step 3: Cross multiply
    1,679.94x = 2,515.65 × 1,405.35
  4. Step 4: Simplify right side
    1,679.94x = 3,535,368.73
  5. Step 5: Solve for x
    x = 3,535,368.73/1,679.94
  6. Step 6: Final answer
    x = 2,104.46

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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.