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Finding the Fourth Proportional to 438.21, 603.81 and 298.35

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Solution

The fourth proportional to 438.21, 603.81 and 298.35 is: 411.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.21 : 603.81 = 298.35 : x
  2. Step 2: Convert to fraction form
    438.21/603.81 = 298.35/x
  3. Step 3: Cross multiply
    438.21x = 603.81 × 298.35
  4. Step 4: Simplify right side
    438.21x = 180,146.71
  5. Step 5: Solve for x
    x = 180,146.71/438.21
  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.