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Finding the Fourth Proportional to 585.50, 806.88 and 419.43

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Solution

The fourth proportional to 585.50, 806.88 and 419.43 is: 578.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.50 : 806.88 = 419.43 : x
  2. Step 2: Convert to fraction form
    585.50/806.88 = 419.43/x
  3. Step 3: Cross multiply
    585.50x = 806.88 × 419.43
  4. Step 4: Simplify right side
    585.50x = 338,431.25
  5. Step 5: Solve for x
    x = 338,431.25/585.50
  6. Step 6: Final answer
    x = 578.02

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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.