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Finding the Fourth Proportional to 1,427.86, 2,141.23 and 549.88

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Solution

The fourth proportional to 1,427.86, 2,141.23 and 549.88 is: 824.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.86 : 2,141.23 = 549.88 : x
  2. Step 2: Convert to fraction form
    1,427.86/2,141.23 = 549.88/x
  3. Step 3: Cross multiply
    1,427.86x = 2,141.23 × 549.88
  4. Step 4: Simplify right side
    1,427.86x = 1,177,425.31
  5. Step 5: Solve for x
    x = 1,177,425.31/1,427.86
  6. Step 6: Final answer
    x = 824.61

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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.