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Finding the Fourth Proportional to 317.99, 477.78 and 202.48

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Solution

The fourth proportional to 317.99, 477.78 and 202.48 is: 304.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.99 : 477.78 = 202.48 : x
  2. Step 2: Convert to fraction form
    317.99/477.78 = 202.48/x
  3. Step 3: Cross multiply
    317.99x = 477.78 × 202.48
  4. Step 4: Simplify right side
    317.99x = 96,742.77
  5. Step 5: Solve for x
    x = 96,742.77/317.99
  6. Step 6: Final answer
    x = 304.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.