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Finding the Fourth Proportional to 916.31, 1,374.49 and 331.37

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Solution

The fourth proportional to 916.31, 1,374.49 and 331.37 is: 497.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.31 : 1,374.49 = 331.37 : x
  2. Step 2: Convert to fraction form
    916.31/1,374.49 = 331.37/x
  3. Step 3: Cross multiply
    916.31x = 1,374.49 × 331.37
  4. Step 4: Simplify right side
    916.31x = 455,463.45
  5. Step 5: Solve for x
    x = 455,463.45/916.31
  6. Step 6: Final answer
    x = 497.06

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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.