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Finding the Fourth Proportional to 915.35, 1,370.96 and 884.60

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Solution

The fourth proportional to 915.35, 1,370.96 and 884.60 is: 1,324.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.35 : 1,370.96 = 884.60 : x
  2. Step 2: Convert to fraction form
    915.35/1,370.96 = 884.60/x
  3. Step 3: Cross multiply
    915.35x = 1,370.96 × 884.60
  4. Step 4: Simplify right side
    915.35x = 1,212,744.36
  5. Step 5: Solve for x
    x = 1,212,744.36/915.35
  6. Step 6: Final answer
    x = 1,324.90

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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.