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Finding the Fourth Proportional to 894.28, 1,234.12 and 495.94

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Solution

The fourth proportional to 894.28, 1,234.12 and 495.94 is: 684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.28 : 1,234.12 = 495.94 : x
  2. Step 2: Convert to fraction form
    894.28/1,234.12 = 495.94/x
  3. Step 3: Cross multiply
    894.28x = 1,234.12 × 495.94
  4. Step 4: Simplify right side
    894.28x = 612,049.47
  5. Step 5: Solve for x
    x = 612,049.47/894.28
  6. Step 6: Final answer
    x = 684.40

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Double scale
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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.