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Finding the Fourth Proportional to 619.81, 928.64 and 436.82

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Solution

The fourth proportional to 619.81, 928.64 and 436.82 is: 654.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.81 : 928.64 = 436.82 : x
  2. Step 2: Convert to fraction form
    619.81/928.64 = 436.82/x
  3. Step 3: Cross multiply
    619.81x = 928.64 × 436.82
  4. Step 4: Simplify right side
    619.81x = 405,644.97
  5. Step 5: Solve for x
    x = 405,644.97/619.81
  6. Step 6: Final answer
    x = 654.47

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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.