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Finding the Fourth Proportional to 635.92, 877.84 and 387.32

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Solution

The fourth proportional to 635.92, 877.84 and 387.32 is: 534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.92 : 877.84 = 387.32 : x
  2. Step 2: Convert to fraction form
    635.92/877.84 = 387.32/x
  3. Step 3: Cross multiply
    635.92x = 877.84 × 387.32
  4. Step 4: Simplify right side
    635.92x = 340,004.99
  5. Step 5: Solve for x
    x = 340,004.99/635.92
  6. Step 6: Final answer
    x = 534.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.