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Finding the Fourth Proportional to 328.86, 454.68 and 291.84

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Solution

The fourth proportional to 328.86, 454.68 and 291.84 is: 403.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.86 : 454.68 = 291.84 : x
  2. Step 2: Convert to fraction form
    328.86/454.68 = 291.84/x
  3. Step 3: Cross multiply
    328.86x = 454.68 × 291.84
  4. Step 4: Simplify right side
    328.86x = 132,693.81
  5. Step 5: Solve for x
    x = 132,693.81/328.86
  6. Step 6: Final answer
    x = 403.50

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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.