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Finding the Fourth Proportional to 716.67, 989.04 and 539.31

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Solution

The fourth proportional to 716.67, 989.04 and 539.31 is: 744.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.67 : 989.04 = 539.31 : x
  2. Step 2: Convert to fraction form
    716.67/989.04 = 539.31/x
  3. Step 3: Cross multiply
    716.67x = 989.04 × 539.31
  4. Step 4: Simplify right side
    716.67x = 533,395.37
  5. Step 5: Solve for x
    x = 533,395.37/716.67
  6. Step 6: Final answer
    x = 744.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.