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Finding the Fourth Proportional to 851.75, 1,277.63 and 339.11

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Solution

The fourth proportional to 851.75, 1,277.63 and 339.11 is: 508.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.75 : 1,277.63 = 339.11 : x
  2. Step 2: Convert to fraction form
    851.75/1,277.63 = 339.11/x
  3. Step 3: Cross multiply
    851.75x = 1,277.63 × 339.11
  4. Step 4: Simplify right side
    851.75x = 433,257.11
  5. Step 5: Solve for x
    x = 433,257.11/851.75
  6. Step 6: Final answer
    x = 508.67

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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.