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Finding the Fourth Proportional to 712.20, 982.77 and 450.18

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Solution

The fourth proportional to 712.20, 982.77 and 450.18 is: 621.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.20 : 982.77 = 450.18 : x
  2. Step 2: Convert to fraction form
    712.20/982.77 = 450.18/x
  3. Step 3: Cross multiply
    712.20x = 982.77 × 450.18
  4. Step 4: Simplify right side
    712.20x = 442,423.40
  5. Step 5: Solve for x
    x = 442,423.40/712.20
  6. Step 6: Final answer
    x = 621.21

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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.