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Finding the Fourth Proportional to 852.58, 1,279.14 and 648.13

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Solution

The fourth proportional to 852.58, 1,279.14 and 648.13 is: 972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.58 : 1,279.14 = 648.13 : x
  2. Step 2: Convert to fraction form
    852.58/1,279.14 = 648.13/x
  3. Step 3: Cross multiply
    852.58x = 1,279.14 × 648.13
  4. Step 4: Simplify right side
    852.58x = 829,049.01
  5. Step 5: Solve for x
    x = 829,049.01/852.58
  6. Step 6: Final answer
    x = 972.40

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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.