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Finding the Fourth Proportional to 658.27, 909.16 and 436.84

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Solution

The fourth proportional to 658.27, 909.16 and 436.84 is: 603.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.27 : 909.16 = 436.84 : x
  2. Step 2: Convert to fraction form
    658.27/909.16 = 436.84/x
  3. Step 3: Cross multiply
    658.27x = 909.16 × 436.84
  4. Step 4: Simplify right side
    658.27x = 397,150.72
  5. Step 5: Solve for x
    x = 397,150.72/658.27
  6. Step 6: Final answer
    x = 603.32

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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.