Home / 1,530.45-2,112.21-867.42

Finding the Fourth Proportional to 1,530.45, 2,112.21 and 867.42

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Solution

The fourth proportional to 1,530.45, 2,112.21 and 867.42 is: 1,197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.45 : 2,112.21 = 867.42 : x
  2. Step 2: Convert to fraction form
    1,530.45/2,112.21 = 867.42/x
  3. Step 3: Cross multiply
    1,530.45x = 2,112.21 × 867.42
  4. Step 4: Simplify right side
    1,530.45x = 1,832,173.20
  5. Step 5: Solve for x
    x = 1,832,173.20/1,530.45
  6. Step 6: Final answer
    x = 1,197.15

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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.