Home / 1,530.75-2,112.38-867.58

Finding the Fourth Proportional to 1,530.75, 2,112.38 and 867.58

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Solution

The fourth proportional to 1,530.75, 2,112.38 and 867.58 is: 1,197.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.75 : 2,112.38 = 867.58 : x
  2. Step 2: Convert to fraction form
    1,530.75/2,112.38 = 867.58/x
  3. Step 3: Cross multiply
    1,530.75x = 2,112.38 × 867.58
  4. Step 4: Simplify right side
    1,530.75x = 1,832,654.30
  5. Step 5: Solve for x
    x = 1,832,654.30/1,530.75
  6. Step 6: Final answer
    x = 1,197.23

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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.