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Finding the Fourth Proportional to 852.77, 1,279.25 and 637.72

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Solution

The fourth proportional to 852.77, 1,279.25 and 637.72 is: 956.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.77 : 1,279.25 = 637.72 : x
  2. Step 2: Convert to fraction form
    852.77/1,279.25 = 637.72/x
  3. Step 3: Cross multiply
    852.77x = 1,279.25 × 637.72
  4. Step 4: Simplify right side
    852.77x = 815,803.31
  5. Step 5: Solve for x
    x = 815,803.31/852.77
  6. Step 6: Final answer
    x = 956.65

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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.