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Finding the Fourth Proportional to 317.62, 474.59 and 243.09

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Solution

The fourth proportional to 317.62, 474.59 and 243.09 is: 363.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.62 : 474.59 = 243.09 : x
  2. Step 2: Convert to fraction form
    317.62/474.59 = 243.09/x
  3. Step 3: Cross multiply
    317.62x = 474.59 × 243.09
  4. Step 4: Simplify right side
    317.62x = 115,368.08
  5. Step 5: Solve for x
    x = 115,368.08/317.62
  6. Step 6: Final answer
    x = 363.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.