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Finding the Fourth Proportional to 3,146.91, 4,720.38 and 955.66

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Solution

The fourth proportional to 3,146.91, 4,720.38 and 955.66 is: 1,433.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.91 : 4,720.38 = 955.66 : x
  2. Step 2: Convert to fraction form
    3,146.91/4,720.38 = 955.66/x
  3. Step 3: Cross multiply
    3,146.91x = 4,720.38 × 955.66
  4. Step 4: Simplify right side
    3,146.91x = 4,511,078.35
  5. Step 5: Solve for x
    x = 4,511,078.35/3,146.91
  6. Step 6: Final answer
    x = 1,433.50

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1.5x scale

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.