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Finding the Fourth Proportional to 674.44, 928.80 and 672.40

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Solution

The fourth proportional to 674.44, 928.80 and 672.40 is: 925.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.44 : 928.80 = 672.40 : x
  2. Step 2: Convert to fraction form
    674.44/928.80 = 672.40/x
  3. Step 3: Cross multiply
    674.44x = 928.80 × 672.40
  4. Step 4: Simplify right side
    674.44x = 624,525.12
  5. Step 5: Solve for x
    x = 624,525.12/674.44
  6. Step 6: Final answer
    x = 925.99

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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.