Home / 1,535.20-2,118.50-872.18

Finding the Fourth Proportional to 1,535.20, 2,118.50 and 872.18

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Solution

The fourth proportional to 1,535.20, 2,118.50 and 872.18 is: 1,203.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.20 : 2,118.50 = 872.18 : x
  2. Step 2: Convert to fraction form
    1,535.20/2,118.50 = 872.18/x
  3. Step 3: Cross multiply
    1,535.20x = 2,118.50 × 872.18
  4. Step 4: Simplify right side
    1,535.20x = 1,847,713.33
  5. Step 5: Solve for x
    x = 1,847,713.33/1,535.20
  6. Step 6: Final answer
    x = 1,203.57

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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.