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Finding the Fourth Proportional to 905.45, 1,350.68 and 893.57

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Solution

The fourth proportional to 905.45, 1,350.68 and 893.57 is: 1,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.45 : 1,350.68 = 893.57 : x
  2. Step 2: Convert to fraction form
    905.45/1,350.68 = 893.57/x
  3. Step 3: Cross multiply
    905.45x = 1,350.68 × 893.57
  4. Step 4: Simplify right side
    905.45x = 1,206,915.91
  5. Step 5: Solve for x
    x = 1,206,915.91/905.45
  6. Step 6: Final answer
    x = 1,332.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.