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Finding the Fourth Proportional to 436.11, 601.72 and 288.69

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Solution

The fourth proportional to 436.11, 601.72 and 288.69 is: 398.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.11 : 601.72 = 288.69 : x
  2. Step 2: Convert to fraction form
    436.11/601.72 = 288.69/x
  3. Step 3: Cross multiply
    436.11x = 601.72 × 288.69
  4. Step 4: Simplify right side
    436.11x = 173,710.55
  5. Step 5: Solve for x
    x = 173,710.55/436.11
  6. Step 6: Final answer
    x = 398.32

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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.