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Finding the Fourth Proportional to 314.61, 471.43 and 192.70

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Solution

The fourth proportional to 314.61, 471.43 and 192.70 is: 288.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.61 : 471.43 = 192.70 : x
  2. Step 2: Convert to fraction form
    314.61/471.43 = 192.70/x
  3. Step 3: Cross multiply
    314.61x = 471.43 × 192.70
  4. Step 4: Simplify right side
    314.61x = 90,844.56
  5. Step 5: Solve for x
    x = 90,844.56/314.61
  6. Step 6: Final answer
    x = 288.75

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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.