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Finding the Fourth Proportional to 642.94, 964.41 and 180.68

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Solution

The fourth proportional to 642.94, 964.41 and 180.68 is: 271.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.94 : 964.41 = 180.68 : x
  2. Step 2: Convert to fraction form
    642.94/964.41 = 180.68/x
  3. Step 3: Cross multiply
    642.94x = 964.41 × 180.68
  4. Step 4: Simplify right side
    642.94x = 174,244.10
  5. Step 5: Solve for x
    x = 174,244.10/642.94
  6. Step 6: Final answer
    x = 271.01

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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.