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Finding the Fourth Proportional to 548,129.28, 756,102.96 and 321,731.04

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Solution

The fourth proportional to 548,129.28, 756,102.96 and 321,731.04 is: 443,803.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,129.28 : 756,102.96 = 321,731.04 : x
  2. Step 2: Convert to fraction form
    548,129.28/756,102.96 = 321,731.04/x
  3. Step 3: Cross multiply
    548,129.28x = 756,102.96 × 321,731.04
  4. Step 4: Simplify right side
    548,129.28x = 243,261,791,667.88
  5. Step 5: Solve for x
    x = 243,261,791,667.88/548,129.28
  6. Step 6: Final answer
    x = 443,803.68

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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.