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Finding the Fourth Proportional to 1,535.60, 2,119.13 and 872.43

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Solution

The fourth proportional to 1,535.60, 2,119.13 and 872.43 is: 1,203.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.60 : 2,119.13 = 872.43 : x
  2. Step 2: Convert to fraction form
    1,535.60/2,119.13 = 872.43/x
  3. Step 3: Cross multiply
    1,535.60x = 2,119.13 × 872.43
  4. Step 4: Simplify right side
    1,535.60x = 1,848,788.22
  5. Step 5: Solve for x
    x = 1,848,788.22/1,535.60
  6. Step 6: Final answer
    x = 1,203.96

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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.