Home / 820.14-1,131.75-609.90

Finding the Fourth Proportional to 820.14, 1,131.75 and 609.90

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Solution

The fourth proportional to 820.14, 1,131.75 and 609.90 is: 841.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.14 : 1,131.75 = 609.90 : x
  2. Step 2: Convert to fraction form
    820.14/1,131.75 = 609.90/x
  3. Step 3: Cross multiply
    820.14x = 1,131.75 × 609.90
  4. Step 4: Simplify right side
    820.14x = 690,254.33
  5. Step 5: Solve for x
    x = 690,254.33/820.14
  6. Step 6: Final answer
    x = 841.63

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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.