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Finding the Fourth Proportional to 317.91, 438.80 and 200.02

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Solution

The fourth proportional to 317.91, 438.80 and 200.02 is: 276.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.91 : 438.80 = 200.02 : x
  2. Step 2: Convert to fraction form
    317.91/438.80 = 200.02/x
  3. Step 3: Cross multiply
    317.91x = 438.80 × 200.02
  4. Step 4: Simplify right side
    317.91x = 87,768.78
  5. Step 5: Solve for x
    x = 87,768.78/317.91
  6. Step 6: Final answer
    x = 276.08

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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.