Home / 1,530.19-2,111.75-867.07

Finding the Fourth Proportional to 1,530.19, 2,111.75 and 867.07

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Solution

The fourth proportional to 1,530.19, 2,111.75 and 867.07 is: 1,196.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.19 : 2,111.75 = 867.07 : x
  2. Step 2: Convert to fraction form
    1,530.19/2,111.75 = 867.07/x
  3. Step 3: Cross multiply
    1,530.19x = 2,111.75 × 867.07
  4. Step 4: Simplify right side
    1,530.19x = 1,831,035.07
  5. Step 5: Solve for x
    x = 1,831,035.07/1,530.19
  6. Step 6: Final answer
    x = 1,196.61

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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.