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Finding the Fourth Proportional to 876.44, 1,314.24 and 414.36

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Solution

The fourth proportional to 876.44, 1,314.24 and 414.36 is: 621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.44 : 1,314.24 = 414.36 : x
  2. Step 2: Convert to fraction form
    876.44/1,314.24 = 414.36/x
  3. Step 3: Cross multiply
    876.44x = 1,314.24 × 414.36
  4. Step 4: Simplify right side
    876.44x = 544,568.49
  5. Step 5: Solve for x
    x = 544,568.49/876.44
  6. Step 6: Final answer
    x = 621.34

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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.