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Finding the Fourth Proportional to 1,410.44, 1,948.30 and 1,311.88

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Solution

The fourth proportional to 1,410.44, 1,948.30 and 1,311.88 is: 1,812.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.44 : 1,948.30 = 1,311.88 : x
  2. Step 2: Convert to fraction form
    1,410.44/1,948.30 = 1,311.88/x
  3. Step 3: Cross multiply
    1,410.44x = 1,948.30 × 1,311.88
  4. Step 4: Simplify right side
    1,410.44x = 2,555,935.80
  5. Step 5: Solve for x
    x = 2,555,935.80/1,410.44
  6. Step 6: Final answer
    x = 1,812.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.