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Finding the Fourth Proportional to 317.02, 436.98 and 239.26

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Solution

The fourth proportional to 317.02, 436.98 and 239.26 is: 329.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.02 : 436.98 = 239.26 : x
  2. Step 2: Convert to fraction form
    317.02/436.98 = 239.26/x
  3. Step 3: Cross multiply
    317.02x = 436.98 × 239.26
  4. Step 4: Simplify right side
    317.02x = 104,551.83
  5. Step 5: Solve for x
    x = 104,551.83/317.02
  6. Step 6: Final answer
    x = 329.80

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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.