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Finding the Fourth Proportional to 716.55, 989.16 and 550.70

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Solution

The fourth proportional to 716.55, 989.16 and 550.70 is: 760.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.55 : 989.16 = 550.70 : x
  2. Step 2: Convert to fraction form
    716.55/989.16 = 550.70/x
  3. Step 3: Cross multiply
    716.55x = 989.16 × 550.70
  4. Step 4: Simplify right side
    716.55x = 544,730.21
  5. Step 5: Solve for x
    x = 544,730.21/716.55
  6. Step 6: Final answer
    x = 760.22

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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.