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Finding the Fourth Proportional to 317.98, 439.24 and 265.70

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Solution

The fourth proportional to 317.98, 439.24 and 265.70 is: 367.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.98 : 439.24 = 265.70 : x
  2. Step 2: Convert to fraction form
    317.98/439.24 = 265.70/x
  3. Step 3: Cross multiply
    317.98x = 439.24 × 265.70
  4. Step 4: Simplify right side
    317.98x = 116,706.07
  5. Step 5: Solve for x
    x = 116,706.07/317.98
  6. Step 6: Final answer
    x = 367.02

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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.