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Finding the Fourth Proportional to 822.64, 1,134.28 and 682.92

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Solution

The fourth proportional to 822.64, 1,134.28 and 682.92 is: 941.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.64 : 1,134.28 = 682.92 : x
  2. Step 2: Convert to fraction form
    822.64/1,134.28 = 682.92/x
  3. Step 3: Cross multiply
    822.64x = 1,134.28 × 682.92
  4. Step 4: Simplify right side
    822.64x = 774,622.50
  5. Step 5: Solve for x
    x = 774,622.50/822.64
  6. Step 6: Final answer
    x = 941.63

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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.