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Finding the Fourth Proportional to 851.50, 1,277.52 and 619.96

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Solution

The fourth proportional to 851.50, 1,277.52 and 619.96 is: 930.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.50 : 1,277.52 = 619.96 : x
  2. Step 2: Convert to fraction form
    851.50/1,277.52 = 619.96/x
  3. Step 3: Cross multiply
    851.50x = 1,277.52 × 619.96
  4. Step 4: Simplify right side
    851.50x = 792,011.30
  5. Step 5: Solve for x
    x = 792,011.30/851.50
  6. Step 6: Final answer
    x = 930.14

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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.