Home / 1,219.39-1,829.50-386.59

Finding the Fourth Proportional to 1,219.39, 1,829.50 and 386.59

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Solution

The fourth proportional to 1,219.39, 1,829.50 and 386.59 is: 580.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.39 : 1,829.50 = 386.59 : x
  2. Step 2: Convert to fraction form
    1,219.39/1,829.50 = 386.59/x
  3. Step 3: Cross multiply
    1,219.39x = 1,829.50 × 386.59
  4. Step 4: Simplify right side
    1,219.39x = 707,271.07
  5. Step 5: Solve for x
    x = 707,271.07/1,219.39
  6. Step 6: Final answer
    x = 580.02

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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.