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Finding the Fourth Proportional to 674.54, 931.18 and 453.64

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Solution

The fourth proportional to 674.54, 931.18 and 453.64 is: 626.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.54 : 931.18 = 453.64 : x
  2. Step 2: Convert to fraction form
    674.54/931.18 = 453.64/x
  3. Step 3: Cross multiply
    674.54x = 931.18 × 453.64
  4. Step 4: Simplify right side
    674.54x = 422,420.50
  5. Step 5: Solve for x
    x = 422,420.50/674.54
  6. Step 6: Final answer
    x = 626.23

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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.