Home / 1,081.33-1,492.13-609.21

Finding the Fourth Proportional to 1,081.33, 1,492.13 and 609.21

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Solution

The fourth proportional to 1,081.33, 1,492.13 and 609.21 is: 840.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.33 : 1,492.13 = 609.21 : x
  2. Step 2: Convert to fraction form
    1,081.33/1,492.13 = 609.21/x
  3. Step 3: Cross multiply
    1,081.33x = 1,492.13 × 609.21
  4. Step 4: Simplify right side
    1,081.33x = 909,026.39
  5. Step 5: Solve for x
    x = 909,026.39/1,081.33
  6. Step 6: Final answer
    x = 840.66

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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.