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Finding the Fourth Proportional to 916.84, 1,374.62 and 300.36

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Solution

The fourth proportional to 916.84, 1,374.62 and 300.36 is: 450.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.84 : 1,374.62 = 300.36 : x
  2. Step 2: Convert to fraction form
    916.84/1,374.62 = 300.36/x
  3. Step 3: Cross multiply
    916.84x = 1,374.62 × 300.36
  4. Step 4: Simplify right side
    916.84x = 412,880.86
  5. Step 5: Solve for x
    x = 412,880.86/916.84
  6. Step 6: Final answer
    x = 450.33

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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.