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Finding the Fourth Proportional to 967.87, 1,451.90 and 556.21

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Solution

The fourth proportional to 967.87, 1,451.90 and 556.21 is: 834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.87 : 1,451.90 = 556.21 : x
  2. Step 2: Convert to fraction form
    967.87/1,451.90 = 556.21/x
  3. Step 3: Cross multiply
    967.87x = 1,451.90 × 556.21
  4. Step 4: Simplify right side
    967.87x = 807,561.30
  5. Step 5: Solve for x
    x = 807,561.30/967.87
  6. Step 6: Final answer
    x = 834.37

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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.