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Finding the Fourth Proportional to 1,376.43, 2,063.53 and 790.48

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Solution

The fourth proportional to 1,376.43, 2,063.53 and 790.48 is: 1,185.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.43 : 2,063.53 = 790.48 : x
  2. Step 2: Convert to fraction form
    1,376.43/2,063.53 = 790.48/x
  3. Step 3: Cross multiply
    1,376.43x = 2,063.53 × 790.48
  4. Step 4: Simplify right side
    1,376.43x = 1,631,179.19
  5. Step 5: Solve for x
    x = 1,631,179.19/1,376.43
  6. Step 6: Final answer
    x = 1,185.08

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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.