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Finding the Fourth Proportional to 424.62, 585.99 and 405.18

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Solution

The fourth proportional to 424.62, 585.99 and 405.18 is: 559.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.62 : 585.99 = 405.18 : x
  2. Step 2: Convert to fraction form
    424.62/585.99 = 405.18/x
  3. Step 3: Cross multiply
    424.62x = 585.99 × 405.18
  4. Step 4: Simplify right side
    424.62x = 237,431.43
  5. Step 5: Solve for x
    x = 237,431.43/424.62
  6. Step 6: Final answer
    x = 559.16

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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.