Home / 1,219.30-1,829.30-439.49

Finding the Fourth Proportional to 1,219.30, 1,829.30 and 439.49

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Solution

The fourth proportional to 1,219.30, 1,829.30 and 439.49 is: 659.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.30 : 1,829.30 = 439.49 : x
  2. Step 2: Convert to fraction form
    1,219.30/1,829.30 = 439.49/x
  3. Step 3: Cross multiply
    1,219.30x = 1,829.30 × 439.49
  4. Step 4: Simplify right side
    1,219.30x = 803,961.43
  5. Step 5: Solve for x
    x = 803,961.43/1,219.30
  6. Step 6: Final answer
    x = 659.36

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1.5x scale

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.