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Finding the Fourth Proportional to 317.22, 436.78 and 242.59

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Solution

The fourth proportional to 317.22, 436.78 and 242.59 is: 334.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.22 : 436.78 = 242.59 : x
  2. Step 2: Convert to fraction form
    317.22/436.78 = 242.59/x
  3. Step 3: Cross multiply
    317.22x = 436.78 × 242.59
  4. Step 4: Simplify right side
    317.22x = 105,957.85
  5. Step 5: Solve for x
    x = 105,957.85/317.22
  6. Step 6: Final answer
    x = 334.03

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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.