Home / 1,535.31-2,118.75-872.34

Finding the Fourth Proportional to 1,535.31, 2,118.75 and 872.34

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Solution

The fourth proportional to 1,535.31, 2,118.75 and 872.34 is: 1,203.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.31 : 2,118.75 = 872.34 : x
  2. Step 2: Convert to fraction form
    1,535.31/2,118.75 = 872.34/x
  3. Step 3: Cross multiply
    1,535.31x = 2,118.75 × 872.34
  4. Step 4: Simplify right side
    1,535.31x = 1,848,270.38
  5. Step 5: Solve for x
    x = 1,848,270.38/1,535.31
  6. Step 6: Final answer
    x = 1,203.84

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1.5x scale

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.