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Finding the Fourth Proportional to 908.96, 1,256.34 and 803.30

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Solution

The fourth proportional to 908.96, 1,256.34 and 803.30 is: 1,110.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.96 : 1,256.34 = 803.30 : x
  2. Step 2: Convert to fraction form
    908.96/1,256.34 = 803.30/x
  3. Step 3: Cross multiply
    908.96x = 1,256.34 × 803.30
  4. Step 4: Simplify right side
    908.96x = 1,009,217.92
  5. Step 5: Solve for x
    x = 1,009,217.92/908.96
  6. Step 6: Final answer
    x = 1,110.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.