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Finding the Fourth Proportional to 424.65, 636.70 and 178.02

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Solution

The fourth proportional to 424.65, 636.70 and 178.02 is: 266.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.65 : 636.70 = 178.02 : x
  2. Step 2: Convert to fraction form
    424.65/636.70 = 178.02/x
  3. Step 3: Cross multiply
    424.65x = 636.70 × 178.02
  4. Step 4: Simplify right side
    424.65x = 113,345.33
  5. Step 5: Solve for x
    x = 113,345.33/424.65
  6. Step 6: Final answer
    x = 266.91

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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.