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Finding the Fourth Proportional to 2,953.50, 4,429.21 and 872.95

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Solution

The fourth proportional to 2,953.50, 4,429.21 and 872.95 is: 1,309.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,953.50 : 4,429.21 = 872.95 : x
  2. Step 2: Convert to fraction form
    2,953.50/4,429.21 = 872.95/x
  3. Step 3: Cross multiply
    2,953.50x = 4,429.21 × 872.95
  4. Step 4: Simplify right side
    2,953.50x = 3,866,478.87
  5. Step 5: Solve for x
    x = 3,866,478.87/2,953.50
  6. Step 6: Final answer
    x = 1,309.12

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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.