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Finding the Fourth Proportional to 716.03, 1,074.36 and 386.59

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Solution

The fourth proportional to 716.03, 1,074.36 and 386.59 is: 580.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.03 : 1,074.36 = 386.59 : x
  2. Step 2: Convert to fraction form
    716.03/1,074.36 = 386.59/x
  3. Step 3: Cross multiply
    716.03x = 1,074.36 × 386.59
  4. Step 4: Simplify right side
    716.03x = 415,336.83
  5. Step 5: Solve for x
    x = 415,336.83/716.03
  6. Step 6: Final answer
    x = 580.06

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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.