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Finding the Fourth Proportional to 292.57, 403.72 and 172.94

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Solution

The fourth proportional to 292.57, 403.72 and 172.94 is: 238.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.57 : 403.72 = 172.94 : x
  2. Step 2: Convert to fraction form
    292.57/403.72 = 172.94/x
  3. Step 3: Cross multiply
    292.57x = 403.72 × 172.94
  4. Step 4: Simplify right side
    292.57x = 69,816.89
  5. Step 5: Solve for x
    x = 69,816.89/292.57
  6. Step 6: Final answer
    x = 238.64

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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.