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Finding the Fourth Proportional to 809.64, 1,214.16 and 376.50

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Solution

The fourth proportional to 809.64, 1,214.16 and 376.50 is: 564.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.64 : 1,214.16 = 376.50 : x
  2. Step 2: Convert to fraction form
    809.64/1,214.16 = 376.50/x
  3. Step 3: Cross multiply
    809.64x = 1,214.16 × 376.50
  4. Step 4: Simplify right side
    809.64x = 457,131.24
  5. Step 5: Solve for x
    x = 457,131.24/809.64
  6. Step 6: Final answer
    x = 564.61

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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.