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Finding the Fourth Proportional to 317.34, 438.14 and 284.09

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Solution

The fourth proportional to 317.34, 438.14 and 284.09 is: 392.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.34 : 438.14 = 284.09 : x
  2. Step 2: Convert to fraction form
    317.34/438.14 = 284.09/x
  3. Step 3: Cross multiply
    317.34x = 438.14 × 284.09
  4. Step 4: Simplify right side
    317.34x = 124,468.68
  5. Step 5: Solve for x
    x = 124,468.68/317.34
  6. Step 6: Final answer
    x = 392.22

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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.