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Finding the Fourth Proportional to 3,145.72, 4,718.81 and 955.99

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Solution

The fourth proportional to 3,145.72, 4,718.81 and 955.99 is: 1,434.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.72 : 4,718.81 = 955.99 : x
  2. Step 2: Convert to fraction form
    3,145.72/4,718.81 = 955.99/x
  3. Step 3: Cross multiply
    3,145.72x = 4,718.81 × 955.99
  4. Step 4: Simplify right side
    3,145.72x = 4,511,135.17
  5. Step 5: Solve for x
    x = 4,511,135.17/3,145.72
  6. Step 6: Final answer
    x = 1,434.05

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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.