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Finding the Fourth Proportional to 908.58, 1,256.40 and 736.86

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Solution

The fourth proportional to 908.58, 1,256.40 and 736.86 is: 1,018.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.58 : 1,256.40 = 736.86 : x
  2. Step 2: Convert to fraction form
    908.58/1,256.40 = 736.86/x
  3. Step 3: Cross multiply
    908.58x = 1,256.40 × 736.86
  4. Step 4: Simplify right side
    908.58x = 925,790.90
  5. Step 5: Solve for x
    x = 925,790.90/908.58
  6. Step 6: Final answer
    x = 1,018.94

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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.