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Finding the Fourth Proportional to 950.87, 1,311.38 and 619.18

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Solution

The fourth proportional to 950.87, 1,311.38 and 619.18 is: 853.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.87 : 1,311.38 = 619.18 : x
  2. Step 2: Convert to fraction form
    950.87/1,311.38 = 619.18/x
  3. Step 3: Cross multiply
    950.87x = 1,311.38 × 619.18
  4. Step 4: Simplify right side
    950.87x = 811,970.62
  5. Step 5: Solve for x
    x = 811,970.62/950.87
  6. Step 6: Final answer
    x = 853.92

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1.5x scale

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.