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Finding the Fourth Proportional to 710.66, 980.01 and 641.44

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Solution

The fourth proportional to 710.66, 980.01 and 641.44 is: 884.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.66 : 980.01 = 641.44 : x
  2. Step 2: Convert to fraction form
    710.66/980.01 = 641.44/x
  3. Step 3: Cross multiply
    710.66x = 980.01 × 641.44
  4. Step 4: Simplify right side
    710.66x = 628,618.84
  5. Step 5: Solve for x
    x = 628,618.84/710.66
  6. Step 6: Final answer
    x = 884.55

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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.