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Finding the Fourth Proportional to 950.72, 1,311.88 and 619.60

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Solution

The fourth proportional to 950.72, 1,311.88 and 619.60 is: 854.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.72 : 1,311.88 = 619.60 : x
  2. Step 2: Convert to fraction form
    950.72/1,311.88 = 619.60/x
  3. Step 3: Cross multiply
    950.72x = 1,311.88 × 619.60
  4. Step 4: Simplify right side
    950.72x = 812,838.33
  5. Step 5: Solve for x
    x = 812,838.33/950.72
  6. Step 6: Final answer
    x = 854.97

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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.