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Finding the Fourth Proportional to 710.66, 980.69 and 395.92

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Solution

The fourth proportional to 710.66, 980.69 and 395.92 is: 546.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.66 : 980.69 = 395.92 : x
  2. Step 2: Convert to fraction form
    710.66/980.69 = 395.92/x
  3. Step 3: Cross multiply
    710.66x = 980.69 × 395.92
  4. Step 4: Simplify right side
    710.66x = 388,274.78
  5. Step 5: Solve for x
    x = 388,274.78/710.66
  6. Step 6: Final answer
    x = 546.36

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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.