Home / 1,270.18-1,905.82-539.92

Finding the Fourth Proportional to 1,270.18, 1,905.82 and 539.92

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Solution

The fourth proportional to 1,270.18, 1,905.82 and 539.92 is: 810.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.18 : 1,905.82 = 539.92 : x
  2. Step 2: Convert to fraction form
    1,270.18/1,905.82 = 539.92/x
  3. Step 3: Cross multiply
    1,270.18x = 1,905.82 × 539.92
  4. Step 4: Simplify right side
    1,270.18x = 1,028,990.33
  5. Step 5: Solve for x
    x = 1,028,990.33/1,270.18
  6. Step 6: Final answer
    x = 810.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.