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Finding the Fourth Proportional to 756.23, 1,134.72 and 409.19

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Solution

The fourth proportional to 756.23, 1,134.72 and 409.19 is: 613.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.23 : 1,134.72 = 409.19 : x
  2. Step 2: Convert to fraction form
    756.23/1,134.72 = 409.19/x
  3. Step 3: Cross multiply
    756.23x = 1,134.72 × 409.19
  4. Step 4: Simplify right side
    756.23x = 464,310.40
  5. Step 5: Solve for x
    x = 464,310.40/756.23
  6. Step 6: Final answer
    x = 613.98

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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.