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Finding the Fourth Proportional to 1,372.35, 1,891.63 and 1,073.07

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Solution

The fourth proportional to 1,372.35, 1,891.63 and 1,073.07 is: 1,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.35 : 1,891.63 = 1,073.07 : x
  2. Step 2: Convert to fraction form
    1,372.35/1,891.63 = 1,073.07/x
  3. Step 3: Cross multiply
    1,372.35x = 1,891.63 × 1,073.07
  4. Step 4: Simplify right side
    1,372.35x = 2,029,852.75
  5. Step 5: Solve for x
    x = 2,029,852.75/1,372.35
  6. Step 6: Final answer
    x = 1,479.10

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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.