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Finding the Fourth Proportional to 1,382.74, 2,073.81 and 458.08

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Solution

The fourth proportional to 1,382.74, 2,073.81 and 458.08 is: 687.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.74 : 2,073.81 = 458.08 : x
  2. Step 2: Convert to fraction form
    1,382.74/2,073.81 = 458.08/x
  3. Step 3: Cross multiply
    1,382.74x = 2,073.81 × 458.08
  4. Step 4: Simplify right side
    1,382.74x = 949,970.88
  5. Step 5: Solve for x
    x = 949,970.88/1,382.74
  6. Step 6: Final answer
    x = 687.02

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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.