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Finding the Fourth Proportional to 614.42, 921.10 and 289.56

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Solution

The fourth proportional to 614.42, 921.10 and 289.56 is: 434.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.42 : 921.10 = 289.56 : x
  2. Step 2: Convert to fraction form
    614.42/921.10 = 289.56/x
  3. Step 3: Cross multiply
    614.42x = 921.10 × 289.56
  4. Step 4: Simplify right side
    614.42x = 266,713.72
  5. Step 5: Solve for x
    x = 266,713.72/614.42
  6. Step 6: Final answer
    x = 434.09

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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.