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Finding the Fourth Proportional to 423.94, 584.90 and 258.11

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Solution

The fourth proportional to 423.94, 584.90 and 258.11 is: 356.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.94 : 584.90 = 258.11 : x
  2. Step 2: Convert to fraction form
    423.94/584.90 = 258.11/x
  3. Step 3: Cross multiply
    423.94x = 584.90 × 258.11
  4. Step 4: Simplify right side
    423.94x = 150,968.54
  5. Step 5: Solve for x
    x = 150,968.54/423.94
  6. Step 6: Final answer
    x = 356.11

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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.