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Finding the Fourth Proportional to 463.90, 640.26 and 298.15

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Solution

The fourth proportional to 463.90, 640.26 and 298.15 is: 411.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.90 : 640.26 = 298.15 : x
  2. Step 2: Convert to fraction form
    463.90/640.26 = 298.15/x
  3. Step 3: Cross multiply
    463.90x = 640.26 × 298.15
  4. Step 4: Simplify right side
    463.90x = 190,893.52
  5. Step 5: Solve for x
    x = 190,893.52/463.90
  6. Step 6: Final answer
    x = 411.50

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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.