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Finding the Fourth Proportional to 334.86, 498.32 and 321.90

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Solution

The fourth proportional to 334.86, 498.32 and 321.90 is: 479.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.86 : 498.32 = 321.90 : x
  2. Step 2: Convert to fraction form
    334.86/498.32 = 321.90/x
  3. Step 3: Cross multiply
    334.86x = 498.32 × 321.90
  4. Step 4: Simplify right side
    334.86x = 160,407.60
  5. Step 5: Solve for x
    x = 160,407.60/334.86
  6. Step 6: Final answer
    x = 479.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.