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Finding the Fourth Proportional to 848.73, 1,272.84 and 255.72

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Solution

The fourth proportional to 848.73, 1,272.84 and 255.72 is: 383.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.73 : 1,272.84 = 255.72 : x
  2. Step 2: Convert to fraction form
    848.73/1,272.84 = 255.72/x
  3. Step 3: Cross multiply
    848.73x = 1,272.84 × 255.72
  4. Step 4: Simplify right side
    848.73x = 325,491.92
  5. Step 5: Solve for x
    x = 325,491.92/848.73
  6. Step 6: Final answer
    x = 383.51

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Double scale
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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.