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Finding the Fourth Proportional to 328.98, 453.98 and 210.90

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Solution

The fourth proportional to 328.98, 453.98 and 210.90 is: 291.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.98 : 453.98 = 210.90 : x
  2. Step 2: Convert to fraction form
    328.98/453.98 = 210.90/x
  3. Step 3: Cross multiply
    328.98x = 453.98 × 210.90
  4. Step 4: Simplify right side
    328.98x = 95,744.91
  5. Step 5: Solve for x
    x = 95,744.91/328.98
  6. Step 6: Final answer
    x = 291.04

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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.