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Finding the Fourth Proportional to 757.80, 1,136.21 and 346.37

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Solution

The fourth proportional to 757.80, 1,136.21 and 346.37 is: 519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.80 : 1,136.21 = 346.37 : x
  2. Step 2: Convert to fraction form
    757.80/1,136.21 = 346.37/x
  3. Step 3: Cross multiply
    757.80x = 1,136.21 × 346.37
  4. Step 4: Simplify right side
    757.80x = 393,541.64
  5. Step 5: Solve for x
    x = 393,541.64/757.80
  6. Step 6: Final answer
    x = 519.32

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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.