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Finding the Fourth Proportional to 852.70, 1,279.05 and 488.20

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Solution

The fourth proportional to 852.70, 1,279.05 and 488.20 is: 732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.70 : 1,279.05 = 488.20 : x
  2. Step 2: Convert to fraction form
    852.70/1,279.05 = 488.20/x
  3. Step 3: Cross multiply
    852.70x = 1,279.05 × 488.20
  4. Step 4: Simplify right side
    852.70x = 624,432.21
  5. Step 5: Solve for x
    x = 624,432.21/852.70
  6. Step 6: Final answer
    x = 732.30

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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.