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Finding the Fourth Proportional to 1,957.83, 2,936.43 and 641.57

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Solution

The fourth proportional to 1,957.83, 2,936.43 and 641.57 is: 962.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.83 : 2,936.43 = 641.57 : x
  2. Step 2: Convert to fraction form
    1,957.83/2,936.43 = 641.57/x
  3. Step 3: Cross multiply
    1,957.83x = 2,936.43 × 641.57
  4. Step 4: Simplify right side
    1,957.83x = 1,883,910.71
  5. Step 5: Solve for x
    x = 1,883,910.71/1,957.83
  6. Step 6: Final answer
    x = 962.24

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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.