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Finding the Fourth Proportional to 463.84, 639.90 and 298.00

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Solution

The fourth proportional to 463.84, 639.90 and 298.00 is: 411.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.84 : 639.90 = 298.00 : x
  2. Step 2: Convert to fraction form
    463.84/639.90 = 298.00/x
  3. Step 3: Cross multiply
    463.84x = 639.90 × 298.00
  4. Step 4: Simplify right side
    463.84x = 190,687.40
  5. Step 5: Solve for x
    x = 190,687.40/463.84
  6. Step 6: Final answer
    x = 411.10

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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.