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Finding the Fourth Proportional to 837.92, 1,257.64 and 427.35

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Solution

The fourth proportional to 837.92, 1,257.64 and 427.35 is: 641.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.92 : 1,257.64 = 427.35 : x
  2. Step 2: Convert to fraction form
    837.92/1,257.64 = 427.35/x
  3. Step 3: Cross multiply
    837.92x = 1,257.64 × 427.35
  4. Step 4: Simplify right side
    837.92x = 537,452.45
  5. Step 5: Solve for x
    x = 537,452.45/837.92
  6. Step 6: Final answer
    x = 641.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.