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Finding the Fourth Proportional to 873.98, 1,311.28 and 548.96

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Solution

The fourth proportional to 873.98, 1,311.28 and 548.96 is: 823.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.98 : 1,311.28 = 548.96 : x
  2. Step 2: Convert to fraction form
    873.98/1,311.28 = 548.96/x
  3. Step 3: Cross multiply
    873.98x = 1,311.28 × 548.96
  4. Step 4: Simplify right side
    873.98x = 719,840.27
  5. Step 5: Solve for x
    x = 719,840.27/873.98
  6. Step 6: Final answer
    x = 823.63

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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.