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Finding the Fourth Proportional to 1,957.28, 2,936.34 and 658.72

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Solution

The fourth proportional to 1,957.28, 2,936.34 and 658.72 is: 988.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.28 : 2,936.34 = 658.72 : x
  2. Step 2: Convert to fraction form
    1,957.28/2,936.34 = 658.72/x
  3. Step 3: Cross multiply
    1,957.28x = 2,936.34 × 658.72
  4. Step 4: Simplify right side
    1,957.28x = 1,934,225.88
  5. Step 5: Solve for x
    x = 1,934,225.88/1,957.28
  6. Step 6: Final answer
    x = 988.22

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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.