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Finding the Fourth Proportional to 463.40, 639.70 and 297.84

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Solution

The fourth proportional to 463.40, 639.70 and 297.84 is: 411.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.40 : 639.70 = 297.84 : x
  2. Step 2: Convert to fraction form
    463.40/639.70 = 297.84/x
  3. Step 3: Cross multiply
    463.40x = 639.70 × 297.84
  4. Step 4: Simplify right side
    463.40x = 190,528.25
  5. Step 5: Solve for x
    x = 190,528.25/463.40
  6. Step 6: Final answer
    x = 411.15

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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.