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Finding the Fourth Proportional to 950.70, 1,311.72 and 619.08

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Solution

The fourth proportional to 950.70, 1,311.72 and 619.08 is: 854.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.70 : 1,311.72 = 619.08 : x
  2. Step 2: Convert to fraction form
    950.70/1,311.72 = 619.08/x
  3. Step 3: Cross multiply
    950.70x = 1,311.72 × 619.08
  4. Step 4: Simplify right side
    950.70x = 812,059.62
  5. Step 5: Solve for x
    x = 812,059.62/950.70
  6. Step 6: Final answer
    x = 854.17

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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.