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Finding the Fourth Proportional to 328.98, 454.05 and 298.20

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Solution

The fourth proportional to 328.98, 454.05 and 298.20 is: 411.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.98 : 454.05 = 298.20 : x
  2. Step 2: Convert to fraction form
    328.98/454.05 = 298.20/x
  3. Step 3: Cross multiply
    328.98x = 454.05 × 298.20
  4. Step 4: Simplify right side
    328.98x = 135,397.71
  5. Step 5: Solve for x
    x = 135,397.71/328.98
  6. Step 6: Final answer
    x = 411.57

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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.