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Finding the Fourth Proportional to 423.63, 585.63 and 379.89

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Solution

The fourth proportional to 423.63, 585.63 and 379.89 is: 525.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.63 : 585.63 = 379.89 : x
  2. Step 2: Convert to fraction form
    423.63/585.63 = 379.89/x
  3. Step 3: Cross multiply
    423.63x = 585.63 × 379.89
  4. Step 4: Simplify right side
    423.63x = 222,474.98
  5. Step 5: Solve for x
    x = 222,474.98/423.63
  6. Step 6: Final answer
    x = 525.16

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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.