Home / 1,890.49-2,835.30-720.63

Finding the Fourth Proportional to 1,890.49, 2,835.30 and 720.63

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Solution

The fourth proportional to 1,890.49, 2,835.30 and 720.63 is: 1,080.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.49 : 2,835.30 = 720.63 : x
  2. Step 2: Convert to fraction form
    1,890.49/2,835.30 = 720.63/x
  3. Step 3: Cross multiply
    1,890.49x = 2,835.30 × 720.63
  4. Step 4: Simplify right side
    1,890.49x = 2,043,188.06
  5. Step 5: Solve for x
    x = 2,043,188.06/1,890.49
  6. Step 6: Final answer
    x = 1,080.77

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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.