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Finding the Fourth Proportional to 671.28, 926.46 and 485.37

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Solution

The fourth proportional to 671.28, 926.46 and 485.37 is: 669.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.28 : 926.46 = 485.37 : x
  2. Step 2: Convert to fraction form
    671.28/926.46 = 485.37/x
  3. Step 3: Cross multiply
    671.28x = 926.46 × 485.37
  4. Step 4: Simplify right side
    671.28x = 449,675.89
  5. Step 5: Solve for x
    x = 449,675.89/671.28
  6. Step 6: Final answer
    x = 669.88

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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.