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Finding the Fourth Proportional to 908.82, 1,355.70 and 896.94

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Solution

The fourth proportional to 908.82, 1,355.70 and 896.94 is: 1,337.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.82 : 1,355.70 = 896.94 : x
  2. Step 2: Convert to fraction form
    908.82/1,355.70 = 896.94/x
  3. Step 3: Cross multiply
    908.82x = 1,355.70 × 896.94
  4. Step 4: Simplify right side
    908.82x = 1,215,984.92
  5. Step 5: Solve for x
    x = 1,215,984.92/908.82
  6. Step 6: Final answer
    x = 1,337.98

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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.