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Finding the Fourth Proportional to 384.40, 574.58 and 298

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Solution

The fourth proportional to 384.40, 574.58 and 298 is: 445.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.40 : 574.58 = 298 : x
  2. Step 2: Convert to fraction form
    384.40/574.58 = 298/x
  3. Step 3: Cross multiply
    384.40x = 574.58 × 298
  4. Step 4: Simplify right side
    384.40x = 171,224.84
  5. Step 5: Solve for x
    x = 171,224.84/384.40
  6. Step 6: Final answer
    x = 445.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.