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Finding the Fourth Proportional to 710.63, 980.73 and 411.99

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Solution

The fourth proportional to 710.63, 980.73 and 411.99 is: 568.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.63 : 980.73 = 411.99 : x
  2. Step 2: Convert to fraction form
    710.63/980.73 = 411.99/x
  3. Step 3: Cross multiply
    710.63x = 980.73 × 411.99
  4. Step 4: Simplify right side
    710.63x = 404,047.27
  5. Step 5: Solve for x
    x = 404,047.27/710.63
  6. Step 6: Final answer
    x = 568.58

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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.