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Finding the Fourth Proportional to 851.40, 1,277.08 and 235.11

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Solution

The fourth proportional to 851.40, 1,277.08 and 235.11 is: 352.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.40 : 1,277.08 = 235.11 : x
  2. Step 2: Convert to fraction form
    851.40/1,277.08 = 235.11/x
  3. Step 3: Cross multiply
    851.40x = 1,277.08 × 235.11
  4. Step 4: Simplify right side
    851.40x = 300,254.28
  5. Step 5: Solve for x
    x = 300,254.28/851.40
  6. Step 6: Final answer
    x = 352.66

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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.