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Finding the Fourth Proportional to 614.34, 921.19 and 289.62

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Solution

The fourth proportional to 614.34, 921.19 and 289.62 is: 434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.34 : 921.19 = 289.62 : x
  2. Step 2: Convert to fraction form
    614.34/921.19 = 289.62/x
  3. Step 3: Cross multiply
    614.34x = 921.19 × 289.62
  4. Step 4: Simplify right side
    614.34x = 266,795.05
  5. Step 5: Solve for x
    x = 266,795.05/614.34
  6. Step 6: Final answer
    x = 434.28

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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.