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Finding the Fourth Proportional to 852.63, 1,279.67 and 339.99

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Solution

The fourth proportional to 852.63, 1,279.67 and 339.99 is: 510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.63 : 1,279.67 = 339.99 : x
  2. Step 2: Convert to fraction form
    852.63/1,279.67 = 339.99/x
  3. Step 3: Cross multiply
    852.63x = 1,279.67 × 339.99
  4. Step 4: Simplify right side
    852.63x = 435,073.30
  5. Step 5: Solve for x
    x = 435,073.30/852.63
  6. Step 6: Final answer
    x = 510.27

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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.