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Finding the Fourth Proportional to 436.26, 656.85 and 328.98

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Solution

The fourth proportional to 436.26, 656.85 and 328.98 is: 495.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.26 : 656.85 = 328.98 : x
  2. Step 2: Convert to fraction form
    436.26/656.85 = 328.98/x
  3. Step 3: Cross multiply
    436.26x = 656.85 × 328.98
  4. Step 4: Simplify right side
    436.26x = 216,090.51
  5. Step 5: Solve for x
    x = 216,090.51/436.26
  6. Step 6: Final answer
    x = 495.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.