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Finding the Fourth Proportional to 456.72, 684.90 and 354.12

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Solution

The fourth proportional to 456.72, 684.90 and 354.12 is: 531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.72 : 684.90 = 354.12 : x
  2. Step 2: Convert to fraction form
    456.72/684.90 = 354.12/x
  3. Step 3: Cross multiply
    456.72x = 684.90 × 354.12
  4. Step 4: Simplify right side
    456.72x = 242,536.79
  5. Step 5: Solve for x
    x = 242,536.79/456.72
  6. Step 6: Final answer
    x = 531.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.