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Finding the Fourth Proportional to 445.52, 614.59 and 305.39

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Solution

The fourth proportional to 445.52, 614.59 and 305.39 is: 421.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.52 : 614.59 = 305.39 : x
  2. Step 2: Convert to fraction form
    445.52/614.59 = 305.39/x
  3. Step 3: Cross multiply
    445.52x = 614.59 × 305.39
  4. Step 4: Simplify right side
    445.52x = 187,690.41
  5. Step 5: Solve for x
    x = 187,690.41/445.52
  6. Step 6: Final answer
    x = 421.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.