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Finding the Fourth Proportional to 614.08, 921.24 and 289.48

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Solution

The fourth proportional to 614.08, 921.24 and 289.48 is: 434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.08 : 921.24 = 289.48 : x
  2. Step 2: Convert to fraction form
    614.08/921.24 = 289.48/x
  3. Step 3: Cross multiply
    614.08x = 921.24 × 289.48
  4. Step 4: Simplify right side
    614.08x = 266,680.56
  5. Step 5: Solve for x
    x = 266,680.56/614.08
  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.