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Finding the Fourth Proportional to 305.10, 457.89 and 112.78

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Solution

The fourth proportional to 305.10, 457.89 and 112.78 is: 169.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.10 : 457.89 = 112.78 : x
  2. Step 2: Convert to fraction form
    305.10/457.89 = 112.78/x
  3. Step 3: Cross multiply
    305.10x = 457.89 × 112.78
  4. Step 4: Simplify right side
    305.10x = 51,640.83
  5. Step 5: Solve for x
    x = 51,640.83/305.10
  6. Step 6: Final answer
    x = 169.26

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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.