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Finding the Fourth Proportional to 950.80, 1,424.34 and 847.60

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Solution

The fourth proportional to 950.80, 1,424.34 and 847.60 is: 1,269.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.80 : 1,424.34 = 847.60 : x
  2. Step 2: Convert to fraction form
    950.80/1,424.34 = 847.60/x
  3. Step 3: Cross multiply
    950.80x = 1,424.34 × 847.60
  4. Step 4: Simplify right side
    950.80x = 1,207,270.58
  5. Step 5: Solve for x
    x = 1,207,270.58/950.80
  6. Step 6: Final answer
    x = 1,269.74

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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.