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Finding the Fourth Proportional to 712.19, 982.97 and 450.15

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Solution

The fourth proportional to 712.19, 982.97 and 450.15 is: 621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.19 : 982.97 = 450.15 : x
  2. Step 2: Convert to fraction form
    712.19/982.97 = 450.15/x
  3. Step 3: Cross multiply
    712.19x = 982.97 × 450.15
  4. Step 4: Simplify right side
    712.19x = 442,483.95
  5. Step 5: Solve for x
    x = 442,483.95/712.19
  6. Step 6: Final answer
    x = 621.30

Related Problems

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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.