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Finding the Fourth Proportional to 314.72, 472.30 and 192.61

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Solution

The fourth proportional to 314.72, 472.30 and 192.61 is: 289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.72 : 472.30 = 192.61 : x
  2. Step 2: Convert to fraction form
    314.72/472.30 = 192.61/x
  3. Step 3: Cross multiply
    314.72x = 472.30 × 192.61
  4. Step 4: Simplify right side
    314.72x = 90,968.74
  5. Step 5: Solve for x
    x = 90,968.74/314.72
  6. Step 6: Final answer
    x = 289.05

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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.