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Finding the Fourth Proportional to 852.79, 1,279.19 and 275.66

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Solution

The fourth proportional to 852.79, 1,279.19 and 275.66 is: 413.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.79 : 1,279.19 = 275.66 : x
  2. Step 2: Convert to fraction form
    852.79/1,279.19 = 275.66/x
  3. Step 3: Cross multiply
    852.79x = 1,279.19 × 275.66
  4. Step 4: Simplify right side
    852.79x = 352,621.52
  5. Step 5: Solve for x
    x = 352,621.52/852.79
  6. Step 6: Final answer
    x = 413.49

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Double scale
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Similar ratio
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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.