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Finding the Fourth Proportional to 412.93, 619.82 and 322.63

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Solution

The fourth proportional to 412.93, 619.82 and 322.63 is: 484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.93 : 619.82 = 322.63 : x
  2. Step 2: Convert to fraction form
    412.93/619.82 = 322.63/x
  3. Step 3: Cross multiply
    412.93x = 619.82 × 322.63
  4. Step 4: Simplify right side
    412.93x = 199,972.53
  5. Step 5: Solve for x
    x = 199,972.53/412.93
  6. Step 6: Final answer
    x = 484.28

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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.