Home / 1,219.29-1,829.85-439.32

Finding the Fourth Proportional to 1,219.29, 1,829.85 and 439.32

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Solution

The fourth proportional to 1,219.29, 1,829.85 and 439.32 is: 659.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.29 : 1,829.85 = 439.32 : x
  2. Step 2: Convert to fraction form
    1,219.29/1,829.85 = 439.32/x
  3. Step 3: Cross multiply
    1,219.29x = 1,829.85 × 439.32
  4. Step 4: Simplify right side
    1,219.29x = 803,889.70
  5. Step 5: Solve for x
    x = 803,889.70/1,219.29
  6. Step 6: Final answer
    x = 659.31

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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.