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Finding the Fourth Proportional to 317.41, 436.65 and 279.88

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Solution

The fourth proportional to 317.41, 436.65 and 279.88 is: 385.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.41 : 436.65 = 279.88 : x
  2. Step 2: Convert to fraction form
    317.41/436.65 = 279.88/x
  3. Step 3: Cross multiply
    317.41x = 436.65 × 279.88
  4. Step 4: Simplify right side
    317.41x = 122,209.60
  5. Step 5: Solve for x
    x = 122,209.60/317.41
  6. Step 6: Final answer
    x = 385.02

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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.