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Finding the Fourth Proportional to 2,957.14, 4,435.66 and 765.86

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Solution

The fourth proportional to 2,957.14, 4,435.66 and 765.86 is: 1,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957.14 : 4,435.66 = 765.86 : x
  2. Step 2: Convert to fraction form
    2,957.14/4,435.66 = 765.86/x
  3. Step 3: Cross multiply
    2,957.14x = 4,435.66 × 765.86
  4. Step 4: Simplify right side
    2,957.14x = 3,397,094.57
  5. Step 5: Solve for x
    x = 3,397,094.57/2,957.14
  6. Step 6: Final answer
    x = 1,148.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.