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Finding the Fourth Proportional to 3,145.45, 4,717.64 and 953.65

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Solution

The fourth proportional to 3,145.45, 4,717.64 and 953.65 is: 1,430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.45 : 4,717.64 = 953.65 : x
  2. Step 2: Convert to fraction form
    3,145.45/4,717.64 = 953.65/x
  3. Step 3: Cross multiply
    3,145.45x = 4,717.64 × 953.65
  4. Step 4: Simplify right side
    3,145.45x = 4,498,949.03
  5. Step 5: Solve for x
    x = 4,498,949.03/3,145.45
  6. Step 6: Final answer
    x = 1,430.31

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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.