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Finding the Fourth Proportional to 367.94, 553.91 and 317.72

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Solution

The fourth proportional to 367.94, 553.91 and 317.72 is: 478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.94 : 553.91 = 317.72 : x
  2. Step 2: Convert to fraction form
    367.94/553.91 = 317.72/x
  3. Step 3: Cross multiply
    367.94x = 553.91 × 317.72
  4. Step 4: Simplify right side
    367.94x = 175,988.08
  5. Step 5: Solve for x
    x = 175,988.08/367.94
  6. Step 6: Final answer
    x = 478.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.