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Finding the Fourth Proportional to 614.34, 920.79 and 492.75

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Solution

The fourth proportional to 614.34, 920.79 and 492.75 is: 738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.34 : 920.79 = 492.75 : x
  2. Step 2: Convert to fraction form
    614.34/920.79 = 492.75/x
  3. Step 3: Cross multiply
    614.34x = 920.79 × 492.75
  4. Step 4: Simplify right side
    614.34x = 453,719.27
  5. Step 5: Solve for x
    x = 453,719.27/614.34
  6. Step 6: Final answer
    x = 738.55

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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.