Home / 1,530.69-2,112.21-867.60

Finding the Fourth Proportional to 1,530.69, 2,112.21 and 867.60

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Solution

The fourth proportional to 1,530.69, 2,112.21 and 867.60 is: 1,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.69 : 2,112.21 = 867.60 : x
  2. Step 2: Convert to fraction form
    1,530.69/2,112.21 = 867.60/x
  3. Step 3: Cross multiply
    1,530.69x = 2,112.21 × 867.60
  4. Step 4: Simplify right side
    1,530.69x = 1,832,553.40
  5. Step 5: Solve for x
    x = 1,832,553.40/1,530.69
  6. Step 6: Final answer
    x = 1,197.21

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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.