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Finding the Fourth Proportional to 740.87, 1,022.21 and 426.23

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Solution

The fourth proportional to 740.87, 1,022.21 and 426.23 is: 588.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.87 : 1,022.21 = 426.23 : x
  2. Step 2: Convert to fraction form
    740.87/1,022.21 = 426.23/x
  3. Step 3: Cross multiply
    740.87x = 1,022.21 × 426.23
  4. Step 4: Simplify right side
    740.87x = 435,696.99
  5. Step 5: Solve for x
    x = 435,696.99/740.87
  6. Step 6: Final answer
    x = 588.09

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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.