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Finding the Fourth Proportional to 1,968.30, 2,953.14 and 872.76

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Solution

The fourth proportional to 1,968.30, 2,953.14 and 872.76 is: 1,309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.30 : 2,953.14 = 872.76 : x
  2. Step 2: Convert to fraction form
    1,968.30/2,953.14 = 872.76/x
  3. Step 3: Cross multiply
    1,968.30x = 2,953.14 × 872.76
  4. Step 4: Simplify right side
    1,968.30x = 2,577,382.47
  5. Step 5: Solve for x
    x = 2,577,382.47/1,968.30
  6. Step 6: Final answer
    x = 1,309.45

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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.