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Finding the Fourth Proportional to 712.29, 982.47 and 488.34

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Solution

The fourth proportional to 712.29, 982.47 and 488.34 is: 673.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.29 : 982.47 = 488.34 : x
  2. Step 2: Convert to fraction form
    712.29/982.47 = 488.34/x
  3. Step 3: Cross multiply
    712.29x = 982.47 × 488.34
  4. Step 4: Simplify right side
    712.29x = 479,779.40
  5. Step 5: Solve for x
    x = 479,779.40/712.29
  6. Step 6: Final answer
    x = 673.57

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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.