Home / 1,530.21-2,111.68-867.06

Finding the Fourth Proportional to 1,530.21, 2,111.68 and 867.06

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Solution

The fourth proportional to 1,530.21, 2,111.68 and 867.06 is: 1,196.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.21 : 2,111.68 = 867.06 : x
  2. Step 2: Convert to fraction form
    1,530.21/2,111.68 = 867.06/x
  3. Step 3: Cross multiply
    1,530.21x = 2,111.68 × 867.06
  4. Step 4: Simplify right side
    1,530.21x = 1,830,953.26
  5. Step 5: Solve for x
    x = 1,830,953.26/1,530.21
  6. Step 6: Final answer
    x = 1,196.54

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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.