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Finding the Fourth Proportional to 684.08, 1,024.52 and 439.86

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Solution

The fourth proportional to 684.08, 1,024.52 and 439.86 is: 658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.08 : 1,024.52 = 439.86 : x
  2. Step 2: Convert to fraction form
    684.08/1,024.52 = 439.86/x
  3. Step 3: Cross multiply
    684.08x = 1,024.52 × 439.86
  4. Step 4: Simplify right side
    684.08x = 450,646.47
  5. Step 5: Solve for x
    x = 450,646.47/684.08
  6. Step 6: Final answer
    x = 658.77

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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.