Home / 1,081.24-1,492.08-639.14

Finding the Fourth Proportional to 1,081.24, 1,492.08 and 639.14

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Solution

The fourth proportional to 1,081.24, 1,492.08 and 639.14 is: 881.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.24 : 1,492.08 = 639.14 : x
  2. Step 2: Convert to fraction form
    1,081.24/1,492.08 = 639.14/x
  3. Step 3: Cross multiply
    1,081.24x = 1,492.08 × 639.14
  4. Step 4: Simplify right side
    1,081.24x = 953,648.01
  5. Step 5: Solve for x
    x = 953,648.01/1,081.24
  6. Step 6: Final answer
    x = 881.99

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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.