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Finding the Fourth Proportional to 286.61, 395.51 and 176.09

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Solution

The fourth proportional to 286.61, 395.51 and 176.09 is: 242.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.61 : 395.51 = 176.09 : x
  2. Step 2: Convert to fraction form
    286.61/395.51 = 176.09/x
  3. Step 3: Cross multiply
    286.61x = 395.51 × 176.09
  4. Step 4: Simplify right side
    286.61x = 69,642.50
  5. Step 5: Solve for x
    x = 69,642.50/286.61
  6. Step 6: Final answer
    x = 242.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.