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Finding the Fourth Proportional to 710.68, 980.71 and 395.96

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Solution

The fourth proportional to 710.68, 980.71 and 395.96 is: 546.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.68 : 980.71 = 395.96 : x
  2. Step 2: Convert to fraction form
    710.68/980.71 = 395.96/x
  3. Step 3: Cross multiply
    710.68x = 980.71 × 395.96
  4. Step 4: Simplify right side
    710.68x = 388,317.03
  5. Step 5: Solve for x
    x = 388,317.03/710.68
  6. Step 6: Final answer
    x = 546.41

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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.