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Finding the Fourth Proportional to 1,376.43, 2,062.91 and 554.25

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Solution

The fourth proportional to 1,376.43, 2,062.91 and 554.25 is: 830.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.43 : 2,062.91 = 554.25 : x
  2. Step 2: Convert to fraction form
    1,376.43/2,062.91 = 554.25/x
  3. Step 3: Cross multiply
    1,376.43x = 2,062.91 × 554.25
  4. Step 4: Simplify right side
    1,376.43x = 1,143,367.87
  5. Step 5: Solve for x
    x = 1,143,367.87/1,376.43
  6. Step 6: Final answer
    x = 830.68

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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.