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Finding the Fourth Proportional to 682.20, 941.10 and 620.76

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Solution

The fourth proportional to 682.20, 941.10 and 620.76 is: 856.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.20 : 941.10 = 620.76 : x
  2. Step 2: Convert to fraction form
    682.20/941.10 = 620.76/x
  3. Step 3: Cross multiply
    682.20x = 941.10 × 620.76
  4. Step 4: Simplify right side
    682.20x = 584,197.24
  5. Step 5: Solve for x
    x = 584,197.24/682.20
  6. Step 6: Final answer
    x = 856.34

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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.