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Finding the Fourth Proportional to 317.83, 438.61 and 193.47

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Solution

The fourth proportional to 317.83, 438.61 and 193.47 is: 266.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.83 : 438.61 = 193.47 : x
  2. Step 2: Convert to fraction form
    317.83/438.61 = 193.47/x
  3. Step 3: Cross multiply
    317.83x = 438.61 × 193.47
  4. Step 4: Simplify right side
    317.83x = 84,857.88
  5. Step 5: Solve for x
    x = 84,857.88/317.83
  6. Step 6: Final answer
    x = 266.99

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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.