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Finding the Fourth Proportional to 1,050.53, 1,450.78 and 865.85

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Solution

The fourth proportional to 1,050.53, 1,450.78 and 865.85 is: 1,195.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.53 : 1,450.78 = 865.85 : x
  2. Step 2: Convert to fraction form
    1,050.53/1,450.78 = 865.85/x
  3. Step 3: Cross multiply
    1,050.53x = 1,450.78 × 865.85
  4. Step 4: Simplify right side
    1,050.53x = 1,256,157.86
  5. Step 5: Solve for x
    x = 1,256,157.86/1,050.53
  6. Step 6: Final answer
    x = 1,195.74

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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.