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Finding the Fourth Proportional to 427.52, 640.92 and 183.98

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Solution

The fourth proportional to 427.52, 640.92 and 183.98 is: 275.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.52 : 640.92 = 183.98 : x
  2. Step 2: Convert to fraction form
    427.52/640.92 = 183.98/x
  3. Step 3: Cross multiply
    427.52x = 640.92 × 183.98
  4. Step 4: Simplify right side
    427.52x = 117,916.46
  5. Step 5: Solve for x
    x = 117,916.46/427.52
  6. Step 6: Final answer
    x = 275.82

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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.