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Finding the Fourth Proportional to 675.09, 931.79 and 451.04

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Solution

The fourth proportional to 675.09, 931.79 and 451.04 is: 622.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.09 : 931.79 = 451.04 : x
  2. Step 2: Convert to fraction form
    675.09/931.79 = 451.04/x
  3. Step 3: Cross multiply
    675.09x = 931.79 × 451.04
  4. Step 4: Simplify right side
    675.09x = 420,274.56
  5. Step 5: Solve for x
    x = 420,274.56/675.09
  6. Step 6: Final answer
    x = 622.55

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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.