Home / 1,530.99-2,112.66-867.85

Finding the Fourth Proportional to 1,530.99, 2,112.66 and 867.85

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Solution

The fourth proportional to 1,530.99, 2,112.66 and 867.85 is: 1,197.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.99 : 2,112.66 = 867.85 : x
  2. Step 2: Convert to fraction form
    1,530.99/2,112.66 = 867.85/x
  3. Step 3: Cross multiply
    1,530.99x = 2,112.66 × 867.85
  4. Step 4: Simplify right side
    1,530.99x = 1,833,466.70
  5. Step 5: Solve for x
    x = 1,833,466.70/1,530.99
  6. Step 6: Final answer
    x = 1,197.57

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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.