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Finding the Fourth Proportional to 712.08, 982.28 and 446.90

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Solution

The fourth proportional to 712.08, 982.28 and 446.90 is: 616.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.08 : 982.28 = 446.90 : x
  2. Step 2: Convert to fraction form
    712.08/982.28 = 446.90/x
  3. Step 3: Cross multiply
    712.08x = 982.28 × 446.90
  4. Step 4: Simplify right side
    712.08x = 438,973.79
  5. Step 5: Solve for x
    x = 438,973.79/712.08
  6. Step 6: Final answer
    x = 616.47

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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.