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Finding the Fourth Proportional to 436, 601.74 and 288.94

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Solution

The fourth proportional to 436, 601.74 and 288.94 is: 398.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    436 : 601.74 = 288.94 : x
  2. Step 2: Convert to fraction form
    436/601.74 = 288.94/x
  3. Step 3: Cross multiply
    436x = 601.74 × 288.94
  4. Step 4: Simplify right side
    436x = 173,866.76
  5. Step 5: Solve for x
    x = 173,866.76/436
  6. Step 6: Final answer
    x = 398.78

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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.