Home / 1,079.60-1,619.88-386.48

Finding the Fourth Proportional to 1,079.60, 1,619.88 and 386.48

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Solution

The fourth proportional to 1,079.60, 1,619.88 and 386.48 is: 579.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.60 : 1,619.88 = 386.48 : x
  2. Step 2: Convert to fraction form
    1,079.60/1,619.88 = 386.48/x
  3. Step 3: Cross multiply
    1,079.60x = 1,619.88 × 386.48
  4. Step 4: Simplify right side
    1,079.60x = 626,051.22
  5. Step 5: Solve for x
    x = 626,051.22/1,079.60
  6. Step 6: Final answer
    x = 579.89

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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.