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Finding the Fourth Proportional to 1,372.53, 1,894.07 and 782.97

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Solution

The fourth proportional to 1,372.53, 1,894.07 and 782.97 is: 1,080.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.53 : 1,894.07 = 782.97 : x
  2. Step 2: Convert to fraction form
    1,372.53/1,894.07 = 782.97/x
  3. Step 3: Cross multiply
    1,372.53x = 1,894.07 × 782.97
  4. Step 4: Simplify right side
    1,372.53x = 1,482,996.07
  5. Step 5: Solve for x
    x = 1,482,996.07/1,372.53
  6. Step 6: Final answer
    x = 1,080.48

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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.