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Finding the Fourth Proportional to 712.18, 982.83 and 491.19

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Solution

The fourth proportional to 712.18, 982.83 and 491.19 is: 677.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.18 : 982.83 = 491.19 : x
  2. Step 2: Convert to fraction form
    712.18/982.83 = 491.19/x
  3. Step 3: Cross multiply
    712.18x = 982.83 × 491.19
  4. Step 4: Simplify right side
    712.18x = 482,756.27
  5. Step 5: Solve for x
    x = 482,756.27/712.18
  6. Step 6: Final answer
    x = 677.86

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.